This essay introduces the key themes of the special issue Anti-Imperialism and the Global Left: New Appraisals, edited by Lorenzo Costaguta, Justine Cousin, Camille Fauroux, and Thomas van Gaalen. The authors review existing scholarship on left-wing anti-imperialism and detail the interventions of the five articles published in the issue. Arguing that left-wing anti-imperialism is a fruitful lens to pursue the decolonization of the history of the left, they conclude by suggesting avenues for further research.