Heritable Inequality: The Dark Legacy of Social Hierarchy
When the first cities and states began to appear 5000+ years ago, top-down social hierarchy and socioeconomic inequality came too.189,203,395
A growing body of research shows the predatory stresses of social hierarchy and socioeconomic inequality have heritable effects that can accumulate over generations.351
This self-reinforcing pattern of system-justified inequality has been reproduced across generations and populations through the dynamic interplay of genes, environments and epigenetic influences, shaping not only our political and economic institutions but also the future of human and planetary well-being.421,364
We are approaching a global tipping point of genomic and climate sustainability driven by the increasingly complex predatory stresses of our social hierarchies transmitted across ever-growing global populations.
Something has to be done, here is why…
Part I: The Biological Engine of Inequality
Genes and environments do not act in isolation but constantly shape one another across individual lifespans and generations.
Over the last decade, a substantial body of research has shown individual differences in cognition, affect and behavior are driven by an interplay between a person’s inherited DNA differences (genetic propensities) and environmental conditions (e.g., social, political, economic, technological, natural and biophysical).1 Moreover, these environmental conditions are not isolated variables, they are intertwined in their effects.403
No one makes choices independent of their DNA differences and the environmental conditions in which those choices are made.
Instead, individuals evoke, select into, create and modify environments, forming groups, coalitions and social hierarchies203,395 based on their genetically-shaped social preferences in a competition to control how rules, regulations, laws and policies regulate the distribution of income, wealth, status and power.417,423
The interplay of genetic factors and environmental influences plays a crucial role in the intergenerational transmission of socioeconomic status, with inherited traits and epigenetic mechanisms reinforcing existing patterns of stratification within social hierarchies.353
Genes and Environments
Although environments are traditionally viewed as external influences independent of genetic variation, decades of research in behavioral genetics have demonstrated that many environmental measures show significant heritability.400 However, this is not to imply that environments are encoded in DNA; instead, it reflects the fact that genetically influenced traits, such as personality, cognitive style, or emotional reactivity, affect the ways individuals select, modify, and evoke aspects of their environments. For instance, it has been shown that children with a genetically influenced predisposition toward sociability tend to seek social environments that differ from those of less outgoing siblings.354 This process, known as genotype–environment correlation, illustrates how environmental factors like parenting, peer groups, and life events can exhibit heritable characteristics.355
Psychologist Sophie von Stumm and colleagues write: “…SES <socioeconomic status> is often assumed to represent solely environmental advantages of wealth and privilege, but it is actually just as heritable as most other complex traits, with estimates from twin studies of about 50%. The main ingredients in most SES scores are parents’ educational attainment and occupational status, both of which are substantially heritable.”13
Allegrini and colleagues explain: “While emerging evidence indicates that polygenic scores are not pure measures of genetic predisposition, previous quantitative genetics findings indicate that measures of the environment are themselves heritable.” They continue: “Our findings have relevance for genomic and environmental prediction models alike, as they show the way in which individuals’ genetic predispositions and environmental effects are intertwined.”90
This highlights a dynamic interplay in which individuals are not passive recipients of experience but active agents whose genetic dispositions influence how they shape their social environments.422,423
It is the insight that genetic factors help shape environments that, in turn, influence development.356
Epigenetics and the Epigenome
Epigenetics is the study of molecular mechanisms that regulate gene activity without altering the DNA sequence. These mechanisms help explain how cells with identical DNA can develop into functionally distinct types such as skin cells, neurons, or muscle cells by turning specific genes on or off. In contrast, the epigenome refers to the actual collection of these chemical modifications such as DNA methylation, histone modifications, and noncoding RNAs present in a particular cell or tissue at a given time. In short, epigenetics is the field of study, while the epigenome is the physical manifestation of the processes being studied.396
The epigenome acts as an interface between the static genome and dynamic environmental influences. It not only determines which genes are active in a particular cell type but also responds to internal and external signals like diet, stress, temperature, or toxins by adjusting gene expression accordingly. This ability allows for cellular plasticity (adaptation to stimuli) while also preserving cellular identity over time and through cell divisions.396
While gene-environment interaction explains how inherited traits express themselves, epigenetics opens an additional layer of complexity, revealing how environmental experiences can influence gene expression.404 For example, research demonstrates that environmental stressors such as socioeconomic inequality and violence are associated with epigenetic modifications, particularly DNA methylation patterns.359 These modifications regulate gene expression without altering the underlying DNA sequence, serving as a biological mechanism through which social experiences can become molecularly embedded 359
There is growing evidence linking epigenetic markers to chronic stress, malnutrition and social marginalization affecting critical periods of development in children. Through the persistence of these adverse social environments, these epigenetic effects can impact subsequent generations, contributing to the biological embedding of social disadvantage.360
Research published in Scientific Reports provides strong evidence that social adversity can become biologically embedded, resulting in accelerated epigenetic aging. By examining multiple European cohorts, the researchers found that individuals with lower socioeconomic status consistently showed accelerated epigenetic aging compared to their more advantaged peers. This suggests there are biological mechanisms through which social and economic disadvantages can lead to faster aging at a cellular level, potentially increasing the risk for age-related diseases and mortality.362
In addition, Willems and colleagues performed a meta-analysis of 140 studies, finding that social disadvantage consistently associates with accelerated epigenetic aging across diverse populations.382 These epigenetic age acceleration markers predict morbidity and mortality independent of chronological age, suggesting a biological mechanism linking social conditions to health outcomes.
Slavich and colleagues, in their article “Human social genomics” make the following point about stressful childhood experiences: “…a growing body of research has shown that experiencing early-life social stressors can alter the gene expression of children in a way that promotes the development of a pro-inflammatory phenotype, which has the ability to persist into adulthood even in the absence of ongoing stress. These epigenetic changes can, in turn, substantially affect individuals’ mental and physical health, as well as their overall well-being and mortality risk.”365
Psychologist and behavioral genetics researcher Sophie von Stumm and colleagues expand the emphasis on children: “Children’s differences in early life cognitive development are driven by the interplay of genetic and environmental factors,”10 where “children are assorted to environments in line with their genetic propensities.”10
In other research, Sophie von Stumm and colleagues explain: “The two best predictors of children’s educational achievement available from birth are parents socioeconomic status (SES) and, recently, children’s inherited DNA differences that can be aggregated in genome-wide polygenic scores (GPS).”13
Polygenic scores are numerical estimates that predict an individual’s genetic predisposition to specific traits or diseases by aggregating the small effects of many genetic variants across the genome.
Koellinger, Harden and colleagues make the following important points about polygenic scores: “Across the board…a higher income PGI <polygenic index> is associated with more favorable lifetime outcomes including higher educational attainment, higher occupational wages, living in a better neighborhood, a lower BMI and waist to hip ratio, lower blood pressure, a lower chance of being hospitalized…”18
Recent research underscores the importance of integrating polygenic scores (PGS), which reflect an individual’s inherited genetic risk, with epigenetic mechanisms such as DNA methylation and non-coding RNA expression to more accurately predict and understand complex traits and diseases.
Studies across psychiatric disorders (e.g., ADHD, schizophrenia, OCD), cancer (e.g., pancreatic tumors), and autoimmune conditions (e.g., multiple sclerosis) demonstrate that genetic risk alone is insufficient; epigenetic factors modulate gene expression in ways that interact with genetic predispositions and environmental exposures. These interactions influence disease development, treatment response, and even social and behavioral traits, supporting an approach that integrates genetic and epigenetic data for more precise and personalized models in medicine, psychology, and public health.366
While polygenic scores reflect inherited DNA differences and provide insight into a person’s genetic propensities, their actual manifestation depends heavily on environmental and lifestyle factors. In other words, polygenic scores estimate potential, not destiny. The expression and impact of genetic predispositions are shaped by the interplay between genes and environment, including factors such as nutrition, stress, education, socioeconomic status, and exposure to toxins or trauma.
Biological Inheritance on Fire
Research shows climate-related stressors, such as pollution, famine, and temperature shifts, can induce epigenetic changes.367
As anthropogenic climate change accelerated during the 19th and 20th centuries, exposures to industrial pollutants, urban stressors, and socially stratified environments began to leave biological imprints on human populations. These include stable, heritable epigenetic markers associated with chronic diseases, stress physiology and metabolic dysfunction with these epigenetic signatures increasingly recognized as mechanisms through which environmentally mediated health disparities persist across generations, particularly among populations disproportionately burdened by climate-related hardship.372
These findings underscore the importance of integrating epigenetic science into public health, climate adaptation, and social policy frameworks, as they reveal how historical and ongoing environmental conditions can shape not only present health outcomes but also the biological inheritance of future generations.
Part II: Industrialization - The Great Accelerator of Inequality & Climate Change
Nobel Laureate Angus Deaton describes the two-edged sword of industrialization: “Many of the great episodes of human progress, including those that are usually described as being entirely good, have left behind them a legacy of inequality. The Industrial Revolution, beginning in Britain in the eighteenth and nineteenth centuries, initiated the economic growth that has been responsible for hundreds of millions of people escaping from material deprivation. The other side of the same Industrial Revolution is what historians call the “Great Divergence,” when Britain, followed a little later by northwestern Europe and North America, pulled away from the rest of the world, creating the enormous gulf between the West and the rest that has not closed to this day. Today’s global inequality was, to a large extent, created by the success of modern economic growth.”374
This is where neoclassical economics comes into the picture. For example, the consensus among economic historians and critical theorists is that the Industrial Revolution and the emergence of neoclassical economics are deeply intertwined.384
It is widely agreed that neoclassical economics developed as a formalized response to the complexities and disruptions brought about by industrial capitalism, especially the need to legitimize market mechanisms, manage class tensions, and create a mathematical, depersonalized model of economic behavior that supported the new industrial social order.384
Rather than offering a critique of industrial inequality, neoclassical economics absorbed the assumptions of industrial capitalism, helping to stabilize and justify its institutional outcomes, particularly class-based hierarchies, labor markets, and capital accumulation.384
In addition, recent peer-reviewed research increasingly critiques neoclassical economics for its role in perpetuating social hierarchy and socioeconomic inequality. These critiques argue that rather than offering a neutral analysis of markets, neoclassical frameworks often normalize and legitimize structural inequality by emphasizing individual rational choice, market equilibrium, and marginal productivity, implicitly blaming individuals for their economic outcomes while ignoring historical, institutional, and power-based asymmetries.385
For example, Amis, Munir, and Mair in Institutions and Economic Inequality argue that neoclassical economic logic embeds itself in institutions, influencing how inequality is framed and addressed. Their work shows how organizational and policy structures shaped by this logic reproduce polarized class structures by treating inequality as an acceptable by-product of efficiency rather than as a systemic failure.386
In less than 200 years, just 4% of the time since the first cities and states began to appear (about 5000 years ago), this is what the Industrial Age and consequently neoclassical economics (est. 1870’s) have wrought.
It could have been different. The pursuit of wealth and power as the purpose of innovation could have been the pursuit of enhancing human well-being, fostering creativity, nurturing sustainable community growth, and ensuring that progress benefits the whole society by promoting health, equity, and overall quality of life.
Nonetheless, here it is.
If we don’t do something about it, there won’t be a fifth version of the Industrial Age to talk about.
Part III: The Modern Consequences
Climate Change, Healthcare Disparities and Global Inequality
The Industrial Age, driven by coal-powered machines, steam engines, and later oil and electricity, unleashed powerful technological systems that have dramatically increased greenhouse gas emissions.347
Since 1850, fossil-fuel-based industrialization has driven not only climatic destabilization but also the growing concentration of wealth.394,350
Even more recently, warming has accelerated substantially since the end of World War II, with temperatures rising at approximately 0.18°C per decade since the 1970’s.347
The Intergovernmental Panel on Climate Change affirms that nearly all net global warming since the mid-19th century is attributable to human activities, primarily fossil fuel combustion.347 Moreover, a growing body of research has linked climate change to worsening economic inequality. Economist Lucas Chancel shows that the wealthiest 10% of the global population now account for nearly half of all emissions, reflecting long-term structural imbalances rooted in the fossil-fuel economy.392 An article by sociologists Brett Clark and Richard York offers a theoretical explanation, arguing that capitalism’s systemic drive for expansion inherently relies on fossil energy, generating both environmental degradation and economic stratification.398 Extending this, Dario Kenner in his book Carbon inequality: The role of the riches in climate change demonstrates how the wealthiest individuals not only emit more carbon but also exert disproportionate political influence to preserve their fossil-fuel-based wealth, blocking climate action and reinforcing the very system driving ecological breakdown.394
Moreover, a broad spectrum of global conflicts ranging from the World Wars to regional revolutions have occurred alongside the upheavals of industrial capitalism, imperial rivalries and the tensions of postcolonial transitions.349
In Nature Energy, social and environmental scholar Paul C. Stern and colleagues make this point about climate change and socioeconomic status: “People with high socioeconomic status disproportionally affect energy-driven greenhouse gas emissions directly through their consumption and indirectly through their financial and social resources.”286
In Nature Communications, Thomas Widemann et al. write: “… the world’s top 10% of income earners are responsible for between 25 and 43% of environmental impact. In contrast, the world’s bottom 10% of income earners exert only around 3–5% of environmental impact.”287
Writing in BioScience, ecologist William J. Ripple et al. make the following important points about climate change and inequality: “The impacts of climate change are already catastrophic for many. However, these impacts are not unfolding uniformly across the entire globe. Instead, they disproportionately affect the world’s most impoverished individuals, who, ironically, have had the least role in causing this issue.”288
Global Socioeconomic Inequality & Unequal Food Distribution
To grasp the scale of modern poverty, consider this: as of 2023, approximately 3.65 billion people, nearly half the global population, live on less than $6.85 per day, a threshold reflecting moderate poverty in upper-middle-income countries.376 By comparison, the entire population of the world in 1800 was roughly 1 billion.377 In absolute terms, more people now live in poverty than were alive at the dawn of the Industrial Age.
This contrast illustrates not only the dramatic rise in global population but also the enduring failure to equitably distribute the wealth generated by industrialization, technological progress, and global trade. Socioeconomic inequality is deeply tied to systems of social hierarchy, where inherited class, race, and geopolitical structures shape who has access to food, education, and economic mobility. These hierarchies are self-reinforcing, intertwining poverty, undernutrition, and political disenfranchisement, all of which can be biologically and socially embedded over generations.402
Data from the World Bank as presented by Our World in Data provides further insight into disparities in dietary consumption and lifespans between high-income and low-income countries. According to the data, high-income countries accounted for approximately 16% of the global population in 2011. People in these countries enjoy substantially higher average levels of dietary consumption (an average of over 3,380 calories per day compared to approximately 2,330 calories in low-income countries) while also benefiting from longer lifespans—approximately 19 years longer than those in lower-income countries.388
However, this data shows there is not enough land in the world convertible to agriculture to allow other countries the same dietary privileges as people living in these rich countries.321
This imbalance is not a mere logistical failure but a symptom of deep structural inequality. The systems that determine food production, distribution, and access are dominated by wealthy nations and transnational corporations, leaving marginalized populations vulnerable to shocks whether from climate disasters, political instability, or market volatility.
The challenge of equitable food distribution is compounded by the fact that high-income countries often have surplus food, while low-income countries struggle with food scarcity.
Hierarchy elites argue these disparities are justified…free markets determine who deserves more and who deserves less.
The Socioeconomic Disparities of Health Care in the Richest Country in the World
Researchers Daniel Oesch and Nathalie Vigna make the following point about a decline in quality life years for the working class in the United States: “The most tangible sign that the quality of life of the working class has declined comes from mortality rates in the United States, showing that the life expectancy of lowly educated middle-aged whites has been falling since 1999.”96
Moreover, research by economists Raj Chetty and David Cutler et al. found “In the United States between 2001 and 2014, higher income was associated with greater longevity, and differences in life expectancy across income groups increased.”99
Nobel laureate Angus Deaton explains the health and mortality gap created by income distribution: “Not only does the top 1% of the income distribution live longer than everyone else, but the gap in life expectancy at 40 years of age is widening, and there has been little gain in life expectancy among the lowest income individuals living in the United States. The infamous 1% is not only richer, but much healthier. Conditional on reaching 40 years of age, individuals in the top 1% of income have 10 to 15 more years to enjoy their richly funded lives and to spend time with their children and grandchildren, and they are pulling away from everyone else. Inequality in health reinforces inequality in income, and perhaps even a longer life is for sale.”100
Nonetheless, while the rich in America live longer, their healthcare outcomes are worse than other high-income countries.
Research published by JAMA in 2018 found the following: “In 2016, the United States spent nearly twice as much as 10 high-income countries on medical care and performed less well on many population health outcomes.”328
Even more startling is what Ezekiel J. Emanuel, MD, PhD et al. found in 2021. In an “Original Investigation” published by JAMA Internal Medicine, the authors found: “…White US citizens in the 1% and 5% highest-income counties obtained better health outcomes than average US citizens but had worse outcomes for infant and maternal mortality, colon cancer, childhood acute lymphocytic leukemia, and acute myocardial infarction compared with average citizens of other developed countries.”332
They continue: “For 6 health outcomes, the health outcomes of White US citizens living in the 1% and 5% richest counties are better than those of average US citizens but are not consistently better than those of average residents in many other developed countries, suggesting that in the US, even if everyone achieved the health outcomes of White US citizens living in the 1% and 5% richest counties, health indicators would still lag behind those in many other countries.”332
An April 2025 report at NBCnews.com: “Not even wealth is saving Americans from dying at rates seen among some of the poorest Europeans”
Moreover, the OECD also found “The United States spends more on healthcare than any other OECD country, both as a proportion of GDP (16.9%) and per person. Spending is expected to increase with healthcare as a proportion of GDP forecast to reach 20% by 2030.”331
Part IV: The Prosocial Deceptions of Predatory Well-Being
System-Justified Harms
System-justified harms–harms that function as social and moral goods–legitimize the self-reinforcing patterns of social hierarchy across generations and populations driven by the interplay of genes and environments.
These harms, such as coercive punishment, exclusion and inequality are justified as fair, necessary and even virtuous because they reflect the values and interests of dominant groups.
System-justified harms suppress and standardize behavior to match the political and economic structure of a social hierarchy, creating descending levels of status, income, wealth and power.
System-justified harms represent a predatory distortion of prosocial behavior, where acts perceived as ‘good’ conceal the extraction and control of resources aligned with the genetically-shaped social preferences of dominant groups, hiding in the prosocial fabric of social hierarchy and its socioeconomic inequities.
When a harm functions as a social and moral good, the harm is turned into a morally right, fair, just and fully deserved punishment.
When a harm is used to produce what is considered morally right, fair, just or fully deserved social outcomes, it is prosocial to punish people for their inherited DNA differences.
System-justified harms are a prosocial instrument of power regulating individual and group conflicts over norms and institutions, primarily the distribution of income, wealth, privileges and power, driven by a competition to create, modify and control environments that align with genetically-influenced social preferences, the result of an interplay between genes and environments across a population.415
While prosocial behavior is often defined as behavior beneficial to others, the degree to which a behavior is prosocial is shaped by the match (alignment) between a person’s genetically-influenced preferences and rules, laws and policies (norms and institutions) in the social environment.177,409
Individuals and groups in the upper socioeconomic structure of a hierarchy protect their socio-genetic dominance with equality exclusions (EQEXs).
EQEXs are the practical application of system-justified harms to the rules, laws and policies that make up the political and economic infrastructure, the norms and institutions, of a social hierarchy.
The political and economic structures of social hierarchies are embedded with EQEXs that steal quality life years from people whose inherited DNA differences are poorly matched and aligned with their social environments.
The Genetic and Ecological Curse of Hierarchy
We are approaching a dual tipping point: one biological, one environmental. On the one hand, the cumulative, heritable nature of inequality has been transforming human institutions in ways that reduce our adaptive capacity as a species. On the other, the environmental degradation driven by inequality and status-driven consumption has pushed greenhouse gas emissions to the point where ecological collapse now threatens the life-support systems of both our genome and the planet.
This convergence is no accident. It is the consequence of thousands of years of transmitting and reinforcing hierarchies that reward the few while transferring costs to the many. The social hierarchies that were born 5000+ years ago189 have evolved into a planetary-scale pathology.
Across the world a jack-in-the-box pattern has dogged human civilizations since the first cities and states appeared—when a social hierarchy and its socioeconomic inequities appear firmly in place, it is only a matter of time before it begins to fail with another one rising to take its place–starting the pattern all over again.425
Sometimes when a new hierarchy emerges it is more egalitarian–for a time.
The revolutionary regimes of France, Russia and Maoist China sought leveling, often through extreme violence. But soon enough, new elites, new privileges, and new inequalities emerged.
As Cannadine showed in Britain’s long class history, class systems do not vanish—they mutate.387
This leads to a tragic, almost Sisyphean view of history: the jack-in-the-box pattern of social hierarchy and inequality425 is wound up each time it is smashed. As power reorganizes, a new structure emerges to fill the vacuum, often under the banner of stability or justice with new justifications, new elites, and new contradictions as the cycle begins to repeat itself…once again.
To move away from this genome and planet destroying trajectory, it is imperative to understand social hierarchy and inequality not just as ethical challenges, but as existential threats. Solutions must go beyond redistribution or policy reform. They must address the epigenetic and ecological impacts of inequality and reimagine social systems around principles of equity, resilience, and intergenerational justice.
Here we are in the 21st century with our smart machines and the global power of the Internet, manipulating environments and genomes in the service of social hierarchy and socioeconomic inequality.
The history of human civilizations is strewn with big men, chiefs, kings, tyrants, despots, oligarchs and plutocrats rising in power until that inevitable point in time when new generations of genes and environments would trample their pyramids of power into the dust.
All the while a daunting figure ‘Ozymandias’ sits in the shadows of our failed civilizations and power hierarchies adding footnotes to earlier chapters on human history and evolution…social dominance, inequality, revolution, state failures and war…with a final chapter on the inequities of income, wealth and well-being, global resource depletion and climate change in the 21st century…a chapter that begins…
"Look on my Works, ye Mighty, and despair!"
…Percy Bysshe Shelley
…by WGW
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