Why We Fight is the title of a series of propaganda films that Frank Capra began making in 1942, with the aim of encouraging the American war effort against Nazism. Director Eugene Jarecki (The Trials of Henry Kissinger) has used the films as a commentary on the contemporary obsession of the American elite with military power.

He also harks back to a speech by President Eisenhower, who, just before he left office, referred to the "military-industrial complex". Eisenhower was worried that too much intelligence, and too much business acumen in America, had become focussed on the production of unnecessary weapons systems.

Since Eisenhower's time, everything has become much worse, as Eugene Jarecki describes it. The war in Iraq was made possible by a new range of weapons systems: a bomb called the "bunker buster" was dropped by stealth bombers on the first night of the conflict.