Earth First! is an environmental advocacy group founded in 1980 in the United States. It focuses on grassroots activism to protect the natural environment, emphasizing the importance of preserving ecosystems and wildlife. The organization is known for its direct action tactics, which include protests, tree-sitting, and other forms of civil disobedience aimed at stopping environmentally harmful projects. The group promotes a philosophy of deep ecology, which argues for the intrinsic value of all living beings and the need for radical changes in society's relationship with nature. Earth First! encourages individuals to take action locally and globally to combat issues like deforestation, pollution, and climate change.