Answer
Sartre was regarded as the more radical figure compared to Aron. Sartre's philosophical concepts, particularly existentialism, challenged conventional societal norms, embraced leftist ideologies, and advocated for individual freedom and social change. In contrast, Aron, while also influential, adopted a more moderate stance, emphasizing the importance of institutions, rationality, and gradual societal progress. These contrasting approaches led to Sartre being viewed as the more radical thinker between the two.