If a Tree Falls: A Story of the Earth Liberation Front is a 2011 American documentary film by filmmaker Marshall Curry. It tells the story of activist Daniel G. McGowan of the Earth Liberation Front (ELF), from his first arson attacks in 1996 to his 2005 arrest by the Department of Justice. The film also examines the ethics of the ELF at large and how terrorism is to be defined.

Marshall Curry is an Oscar-winning American documentary director, producer, cinematographer and editor. His films include Street Fight, Racing Dreams, If a Tree Falls: A Story of the Earth Liberation Front, Point and Shoot, and A Night at the Garden. His first fiction film was the Academy Award-winning short film The Neighbors' Window (2019).