Derrick Jensen (born December 19, 1960) is an American ecophilosopher, writer, author and environmentalist in the anarcho-primitivist tradition,[4][5] though he rejects the label "anarchist".

[8] He specifically challenges the lifestyle changes and individualistic solutions broadly advocated, considering them drastically inadequate to the global scale of environmental catastrophe.

[9] Instead, he promotes civil disobedience, radical activism, and dismantling infrastructure on a massive level in order to halt what he has called "the murder of the planet".

[8] Along with Lierre Keith, Jensen is a founder and leader within Deep Green Resistance.

His belief, and the organization's position, that women-only spaces should exclude trans women has drawn criticism.