Bowling for Columbine is a 2002 documentary film written, produced, directed, and narrated by Michael Moore. The film explores what Moore suggests are the primary causes for the Columbine High School massacre in 1999 and other acts of gun violence. He focuses on the background and environment in which the massacre took place and some common public opinions and assumptions about related issues. The film also looks into the nature of violence in the United States, and American violence abroad.