David McCullough is an American historian whose exhaustively researched biographies were both popular and praised by critics. His works garnered an impressive list of prizes and awards, including two Pulitzer Prizes, two National Book Awards, and two Francis Parkman Prizes from the Society of American Historians. He was the recipient of the 1995 Charles Frankel Prize of the National Endowment for the Humanities (now the National Humanities Medal) and a 2006 Presidential Medal of Freedom.