Africana philosophy is the work of philosophers of African descent and others whose work deals with the subject matter of the African diaspora. Africana philosophy includes the philosophical ideas, arguments and theories of particular concern to people of African descent. Some of the topics explored by Africana philosophy include pre-Socratic African philosophy and modern-day debates discussing the early history of Western philosophy, post-colonial writing in Africa and the Americas, black resistance to oppression, black existentialism in the United States, and the meaning of "blackness" in the modern world.