The Liberation Support Movement (LSM) was an anti-imperialist organization founded by Don Barnett and based in Canada and the United States from 1968 until 1982. The group's activities supported indigenous resistance movements in Angola, Mozambique, Guinea-Bissau, South Africa/Azania, East Timor, and more. They were in contact and collaboration with the Danish M-KA organization as well. Here, we give an audio-presentation of LSM’s “Principles of Anti-Imperialist Work”, where they lay out the theory and praxis that guided their organization.