如果树倒下讲述了地球解放阵线(ELF)活动家 Daniel G. McGowan自1996年第一次开始纵火直到2005年被捕的故事。 这部电影介绍了ELF的道德观以及启发观众思考怎样才算是恐怖主义。 许多人认为这是2011年最佳纪录片之一,因为它发人深省地描述了复杂的环境和政治问题。如果树倒下首映时深受好评,并被提名为奥斯卡最佳纪录片奖。IF A TREE FALLS is a rare behind-the-curtain look at the Earth Liberation Front, the radical environmental group that the FBI calls America's 'number one domestic terrorist threat.' With unprecedented access and a nuanced point of view, the documentary tells the story of Daniel McGowan, an ELF member who faced life in prison for two multi-million dollar arsons against Oregon timber companies. The film employs McGowan's story to examine larger questions about environmentalism, activism, and terrorism.