Earth liberation has no universal understanding as a concept, as it is much considered to be a part of radical environmentalism, or as a militant off-shoot, favouring instead radical and revolutionary environmentalism.
As a movement 
Earth liberationists reject the mainstream environmental movement and include a diversity of individuals with a variety of different ideologies as well as theories. Activists include; animal liberationists, anti-capitalists, green anarchists, deep ecologists, eco-feminists and anti-globalisationists. They are notably also within the ELF and ELA, with others from the Animal Liberation Front (ALF) and Class War.
A primary concern is making long lasting, systemic change, by overtunning contemporary social and ecological conditions, as part of an earth liberation movement, similar to the aims of the animal liberation movement.
- Bron Taylor, Best, Steven and Best & Nocella. Igniting a Revolution: Voices in Defense of the Earth, Lantern Books, 2006, p.4 & 5
- Manes, Christopher, 1990. Green Rage: Radical Environmentalism and the Unmaking of Civilization, Boston: Little, Brown and Co.
- Quoting "Burn the Rich", popular Class War slogan. House Fires With a Message in the Northwest, The New York Times, March 3rd 2008.