What did marcus garvey advocate for blacks?

Marcus Garvey defended black nationalism and the Return to Africa movement.

Explanation:

Marcus Mosiah Garvey was a communicator, entrepreneur and Jamaican activist.

He is considered one of the greatest activists in the history of the black nationalist movement. Garvey led the larger movement of African descendants until then; is remembered by some as the main idealist of the "return to Africa" movement, deeply inspired so that the blacks would have the "redemption" of Africa, and that the European colonial powers would destabilize their colonies of the continent. In his own words, "I have no desire to take all black people back to Africa, there are blacks who are not good elements here and probably will not be there."

which statement explains one of the reasons world war 1 was so much more destructive than earlier conflicts