A people without the knowledge of their past history, origin and cultural is like a tree without roots” the idea gravey express here best expresses the ideals of which movement

maybe Black Power Movement

Explanation:

This a quote of Marcus Garvey "A people without the knowledge of their past history, origin and culture is like a tree without roots. "

In his biography it says: "His ideas exerted a considerable influence on such movements as Rastafari, the Nation of Islam, and the Black Power Movement." The Black Power Movement is the most likely to be the answer.

a. by accepting the election of president abraham lincoln in 1860 and convincing other southern states to do the same