​This paper explores the philosophical context of the of political culture on the French radical left. Radical left refers to a group consisting of political and civil activists, intellectuals, writers, scholars, and politicians who assert their commitment to the priority of equality in economic and social conditions over values of freedom, justice, and citizenship. Unlike the moderate left, they believe that the satisfaction of equality claims requires the overthrow of the capitalist system and the abolition of the market economy. In the first section, the paper argues that the thought of the French moderate left, unlike the moderate left in other democratic countries, did not favour a break with the radical left and continued to share with it the idea that true liberation requires eradicating the causes of exploitation and alienation. Even though the moderate left adopted, when it held power, pragmatic policies and committed itself to the respect of democracy and constitutional order, it did not give up the idea of total societal transformation. The second section distinguishes the culture of the new radical left from that of the extreme Marxist radical left in its Trotskyist and Maoist forms. The third section traces the philosophical background of French new radical leftist discourse, writings, and methods.