Abstract
In a little remembered event in December 1961, Sartre entered into a debate with Roger Garaudy, as well as other representatives of the Parti Communiste Française (PCF), on the topic of the existence of a universal dialectical law applicable to nature as well as to human thought. In the debate, Sartre seeks to rebut the notion that humankind is merely an “alien addition“ to nature, as Engels maintained, and instead argues that individual subjectivity cannot be reduced to an object of knowledge. This paper highlights the importance of the debate for both sides, but particularly for Sartre and his Critique of Dialectical Reason