In fact, at the core of modern history lies this remarkable pattern: Over the past five centuries, Anglo-American society has entered a new era—a new turning—every two decades or so. At the start of each turning, people change how they feel about themselves, the culture, the nation, and the future. Turnings come in cycles of four. Each cycle spans the length of a long human life, roughly eighty to one hundred years, a unit of time the ancients called the saeculum. Together, the four turnings of the saeculum comprise history’s seasonal rhythm of growth, maturation, entropy, and destruction: ■
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