QUOTE : It's tempting to imagine that economic injustice destabilizes societies to the point where they collapse and have to reform themselves, but the opposite appears to be true. Countries with large income disparities, such as the United States, are among the most powerful and wealthy countries in the world, perhaps because they can protect themselves with robust economies and huge militaries. They're just not very free. Even societies with income disparities that are truly off the chart—medieval Europe had a Gini coefficient of .79—are relatively stable until a cataclysmic event like the plague triggers a radical redistribution of wealth. During the last decades, progressive reforms have reduced the Gini coefficient—and stabilized the economies—in many Latin American countries. From every standpoint—morally, politically, economically—such reforms are clearly the right things to do. But throughout the great sweep of human history, egalitarian societies with low Gini coefficients rarely dominate world events. From the Han Dynasty of Ancient China to the Roman Empire to the United States, there seems to be a sweet spot of economic injustice that is moderately unfair to most of its citizens but produces extremely powerful societies. Economist Walter Scheidel calculates that 3,500 years ago, such large-scale states controlled only 1 percent of the Earth's habitable landmass but represented at least half the human population. By virtually any metric, that's a successful society. 'For thousands of years, most of humanity lived in the shadow of these behemoths,' Scheidel writes. 'This is the environment that created the 'original one percent,' made up of competing but often closely intertwined elite groups.' The question, then, is how do ordinary people protect their freedom in the face of such highly centralized state control?