Jack Goldstone & Peter Turchin:

Almost three decades ago, one of us, Jack Goldstone, published a simple model to determine a country’s vulnerability to political crisis. The model was based on how population changes shifted state, elite and popular behavior. Goldstone argued that, according to this Demographic-Structural Theory, in the 21st century, America was likely to get a populist, America-first leader who would sow a whirlwind of conflict.

Then ten years ago, the other of us, Peter Turchin, applied Goldstone’s model to U.S. history, using current data. What emerged was alarming: The U.S. was heading toward the highest level of vulnerability to political crisis seen in this country in over a hundred years. Even before Trump was elected, Turchin published his prediction that the U.S. was headed for the “Turbulent Twenties,” forecasting a period of growing instability in the United States and western Europe.

Given the Black Lives Matter protests and cascading clashes between competing armed factions in cities across the United States, from Portland, Oregon to Kenosha, Wisconsin, we are already well on our way there. But worse likely lies ahead.

Our model is based on the fact that across history, what creates the risk of political instability is the behavior of elites, who all too often react to long-term increases in population by committing three cardinal sins.

First, faced with a surge of labor that dampens growth in wages and productivity, elites seek to take a larger portion of economic gains for themselves, driving up inequality.