Robert Allan Caro (born October 30, 1935) is an American journalist and author known for his celebrated biographies of United States political figures Robert Moses and Lyndon B. Johnson. After working for many years as a reporter, Caro wrote The Power Broker (1974), a biography of New York urban planner Robert Moses, and chosen by the Modern Library as one of the hundred greatest nonfiction books of the twentieth century. He has since written four of a planned five volumes of The Years of Lyndon Johnson (1982, 1990, 2002, 2012), a biography of the former president.