A historian explains why 2019 marks the beginning of the next 74-year cycle of American history

A historian explains why 2019 marks the beginning of the next 74-year cycle of American history: A century ago, historian Arthur Schlesinger, Sr. argued that history occurs in cycles. His son, Arthur Schlesinger, Jr., furthered this theory in his own scholarship. As I reflect on Schlesinger’s work and the history of the United States, it seems clear to me that American history has three 74-year