Why do some leaders transform nations while others bring collapse? Jared Diamond explores how timing, circumstance, and individual genius intersect in history—from Genghis Khan's wet decade to Steve Jobs' simplicity obsession. His new book examines prophets, coaches, and kings who shaped civilization. Leaders need both the right moment in history and exceptional personal qualities; Bill Gates recognized the 1980 computer revolution's timing, while Mark Zuckerberg benefited from 2004's internet infrastructure without manufacturing the opportunity.