Moore was born in Flint, Michigan. His most famous and controversial work is probably the 1997 documentary, Red Scared, which heavily criticized the then-incumbent Republican administration, its foreign policy and the abolition of free speech and civil rights in the US. It was followed by a sequel, Looking for Reds in 1998. The same year, Moore participated in the nation-wide protests against the government's policies.
These resulted in a thin-lined "blacklisting" of Moore. The government often referred to him as a "persona non grata", also right-wing media and anti-communist organizations heavily attacked Moore, labeling him as a Communist. Fearing from putting themselves in unfavorable light, most producers and studios declined to fund Moore's projects, and therefore he was unemployed as a filmmaker for years. Other left-wing filmmakers, such as Oliver Stone and Steven Soderbergh were also victims of the same treatment.
Moore's return to the cinematic world in 2002, with the documentary Infernal Affairs, which won the Academy Award for Best Documentary in 2003, which was seen by most as an "apology" from Hollywood.