The social symptoms of this trend—again, not unlike the 1930s—are broadly similar across the world: the rise of ethnocentric populism, the success of charismatic strongmen, a drift toward we-first economic autarky, a disaffection with due process and globalism, and an enthusiasm for grievance-based nationalism.

We know when the Millennial Crisis began (2008). When is it likely to end? One approximate way to forecast the end year is to refer back to the average length of the Anglo-American saeculum. Since the first of these saecula began, five have fully run their course. Their average length, measured from resolution to resolution, is ninety-two years.

At this moment in the Millennial Crisis era—possibly just beyond the halfway point—it makes sense to pause and try to assess America’s overall social mood.