Home > Uncategorized > Income: the U.S. top 0.01 percent 1950 to 2015

Income: the U.S. top 0.01 percent 1950 to 2015

  1. Ken Zimmerman
    July 1, 2021 at 11:46 am


    How has the distribution of income and wealth developed over time, and why has it sometimes changed so much? Considering the enormous amount of attention that inequality has received in recent years, we still know much less about this than might be expected. A large and steadily growing body of often highly technical scholarship attends to the most pressing question: why income has frequently become more concentrated over the course of the last generation. Less has been written about the forces that caused inequality to fall across much of the world earlier in the twentieth century—and far less still about the distribution of material resources in the more distant past. To be sure, concerns about growing income gaps in the world today have given momentum to the study of inequality in the longer run, just as contemporary climate change has encouraged analysis of pertinent historical data. But we still lack a proper sense of the big picture, a global survey that covers the broad sweep of observable history. A cross-cultural, comparative, and long-term perspective is essential for our understanding of the mechanisms that have shaped the distribution of income and wealth.

    For example. Material inequality requires access to resources beyond the minimum that is needed to keep us all alive. Surpluses already existed tens of thousands of years ago, and so did humans who were prepared to share them unevenly. Back in the last Ice Age, hunter-gatherers found the time and means to bury some individuals much more lavishly than others. But it was food production—farming and herding—that created wealth on an entirely novel scale. Growing and persistent inequality became a defining feature of the Holocene. The domestication of plants and animals made it possible to accumulate and preserve productive resources. Social norms evolved to define rights to these assets, including the ability to pass them on to future generations. Under these conditions, the distribution of income and wealth came to be shaped by a variety of experiences: health, marital strategies and reproductive success, consumption and investment choices, bumper harvests, and plagues of locusts and rinderpest determined fortunes from one generation to the next. Adding up over time, the consequences of luck and effort favored unequal outcomes in the long term.

    In principle, institutions could have flattened emerging disparities through interventions designed to rebalance the distribution of material resources and the fruits from labor, as some premodern societies are indeed reputed to have done. In practice, however, social evolution commonly had the opposite effect. Domestication of food sources also domesticated people. The formation of states as a highly competitive form of organization established steep hierarchies of power and coercive force that skewed access to income and wealth. Political inequality reinforced and amplified economic inequality. For most of the agrarian period, the state enriched the few at the expense of the many: gains from pay and benefactions for public service often paled next to those from corruption, extortion, and plunder. As a result, many premodern societies grew to be as unequal as they could possibly be, probing the limits of surplus appropriation by small elites under conditions of low per capita output and minimal growth. And when more benign institutions promoted more vigorous economic development, most notably in the emergent West, they continued to sustain high inequality. Urbanization, commercialization, financial sector innovation, trade on an increasingly global scale, and, finally, industrialization generated rich returns for holders of capital. As rents from the naked exercise of power declined, choking off a traditional source of elite enrichment, more secure property rights and state commitments strengthened the protection of hereditary private wealth. Even as economic structures, social norms, and political systems changed, income and wealth inequality remained high or found new ways to grow.

    For thousands of years, civilization did not lend itself to peaceful equalization. Across a wide range of societies and different levels of development, stability favored economic inequality. This was as true of Pharaonic Egypt as it was of Victorian England, as true of the Roman Empire as of the United States. Violent shocks were of paramount importance in disrupting the established order, in compressing the distribution of income and wealth, in narrowing the gap between rich and poor. Throughout recorded history, the most powerful leveling invariably resulted from the most powerful shocks. Four different kinds of violent ruptures have flattened inequality: mass mobilization warfare, transformative revolution, state failure, and lethal pandemics. I call these the Four Horsemen of Leveling. Just like their biblical counterparts, they went forth to “take peace from the earth” and “kill with sword, and with hunger, and with death, and with the beasts of the earth.” Sometimes acting individually and sometimes in concert with one another, they produced outcomes that to contemporaries often seemed nothing short of apocalyptic. Hundreds of millions perished in their wake. And by the time the dust had settled, the gap between the haves and the have-nots had shrunk, sometimes dramatically.

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