Why We Fight is a 2005 documentary film directed by Eugene Jarecki about the United States’s relationship with war as a business. The film describes the rise and maintenance of the United States military-industrial complex and its fifty-year involvement with the wars led by the U.S. to date, particularly the 2003 Invasion of Iraq. Segment 1 (9:37 min)

Why We Fight was first screened at the 2005 Sundance Film Festival on January 17, 2005, and won the Grand Jury Prize for Documentary. It received a limited theatrical release on January 20, 2005.