Many western intellectuals sought to revive humanism and democratic values after the horrors of world war ii; a group of writers, one of them being pointed out that colonialism made their task ever more difficult.

Frantz Fanon

Explanation:

Born in Martinique in 1925 and having served during WWII under the Free French Army, Fanon strongly believed that colonialism was an inherent obstacle in achieving true democracy. He believed that colonialism was enforced by force and it implied the subjugation of a group of indigenous people under (in this case) european powers, and as a consequence, it placed the white european above the subjugated black or indigenous population, disproving the notion of equality in a democratic society. He advocated for the decolonization of Africa, particularly Algeria from French rule, and encouraged Pan-Africanism and Marxist Humanism.

c. the dred scott v. sandford case,