Lefebvre joined the PCF in 1928 and became one of the most prominent French Marxist intellectuals during the second quarter of the 20th century, before joining the French resistance. From 1944 to 1949, he was the director of "Radiodiffusion Française", a French radio broadcaster in Toulouse. Among his works was a highly influential, anti-Stalinist text on dialectics called "Dialectical Materialism" (1940). Seven years later, Lefebvre published his first volume of "The Critique of Everyday Life". His early work on method was applauded and borrowed centrally by the philosopher Jean-Paul Sartre in "Critique of Dialectical Reason" (1960). During Lefebvre's thirty-year stint with the PCF, he was chosen to publish critical attacks on opposed theorists, especially existentialists like Sartre and Lefebvre's former colleague Nizan, only to intentionally get himself expelled from the party for his own heterodox theoretical and political opinions in the late 1950s. He then went from serving as a primary intellectual for the PCF to becoming one of France's most important critics of the PCF's politics (e.g. immediately, the lack of an opinion on Algeria, and more generally, the partial apologism for and continuation of Stalinism) and intellectual thought (i.e. structuralism, especially the work of Louis Althusser).