David Nasaw (born July 18, 1945) is an American author, biographer and historian who specializes in the cultural, social and business history of early 20th Century America.

Nasaw has appeared in several documentaries, including The American Experience, 1996, and two episodes of the History Channel's April 2006 miniseries 10 Days That Unexpectedly Changed America: "The Homestead Strike" and "The Assassination of President McKinley".

Since June 10, 1978, Nasaw has been married to Dinitia Smith,[27][28] a novelist, Emmy award-winning filmmaker,[29] and journalist, who worked as a correspondent for The New York Times for 12 years.

[38] Going Out "unearths fascinating details about everything from the early history of the movies to pre-World War I dance crazes," wrote critic Jackson Lears in the New York Times.

[39] Nasaw "raises fundamental questions about the web of connections joining commercial play, public space and cultural cohesion," he wrote.

[33] A reviewer praised Nasaw for "bringing to life the fascinating world of business moguls, statesmen, journalists and intellectuals in which Carnegie moved.

[44] "I told him I would undertake this project if I had guarantees to see all the documents at the Kennedy Library and elsewhere, and if I were free to write whatever I wanted, with no censorship or interference of any kind," Nasaw said.

Senator Kennedy said he had read and admired Nasaw's book on Hearst and believed the historian would make a "fair evaluation of his life and contributions."