She won a Pulitzer Prize for her 2022 book G-Man: J. Edgar Hoover and the Making of the American Century, and also wrote The Day Wall Street Exploded: A Story of America in Its First Age of Terror in 2009.

[3] Gage attended Yale as an undergraduate, graduating in 1994 with a degree in American studies, then earned her PhD in history at Columbia University in 2004.

[4] In September 2021, she announced that she would resign as director of the Grand Strategy program, effective December 2021, citing concerns about academic freedom and a "board of visitors" that was formed to oversee her work.

[5] In an interview with The New York Times, she stated, "It's very difficult to teach effectively or creatively in a situation where you are being second-guessed and undermined and not protected."

[8] It was a finalist for the 2023 National Book Critics Circle Award for Biography.