Issue 21 of the Marxist Left Review surveys some of the key moments in the history of the left: with pieces on the Paris Commune, the origins of the Communist Party of Australia, and a look at the origins of Indigenous oppression and resistance today. The full list of articles is: Pandemic politics: 2020 in hindsight, and a perspective on 2021, by Omar Hassan - Celebrating the Paris Commune of 1871: "Glorious harbinger of a new society", by Sandra Bloodworth - Capitalism, colonialism and class: A Marxist explanation of Indigenous oppression today, by Jordan Humphreys - Between syndicalism and reformism: Founding the Communist Party of Australia, by Mick Armstrong - Reds at the blackboard: Militancy in the teacher unions, by Tess Lee Ack - Economic crises are unavoidable under capitalism, by Rick Kuhn - From rising tide to Govett's Leap: The socialist life of Gordon Childe, by Terry Irving - Review: Gordon Childe and the fatal lure of politics, by Liz Ross - Review: The real history of WWI, by Ryan Stanton - Review: Radical Australian trade unionism, by Diane Fieldes - Review: The making of Australia's security state, by Emma Norton - Review: Victor Serge's final words, by Ian Birchall