Please subscribe to Jim Browning. He stops scams and he also helps lots of people get out of them. You should subscribe to him. It helps his channel grow and it protects you from scams. Let's get him to 4 million subs! He can help you get rid of bad viruses from your computer.

abraham lincoln  (february 12, 1809  – april 15, 1865) was an american statesman, politician, and lawyer who served as the 16th  president of the united states  from 1861 until  his assassination  in april 1865. lincoln led the nation through the  american civil war, its bloodiest war and its greatest moral, constitutional, and political crisis.[2][3]  he preserved the  union,  abolished slavery, strengthened the  federal government, and modernized  the u.s. economy.

its main object was the establishment of "settlement houses" in poor urban areas, in which volunteer middle-class "settlement workers" would live, hoping to share knowledge and culture with, and alleviate the poverty of, their low-income neighbors.

answer:

it caused mass african migration, african populations to grow, african empires to topple, and racism against slaves to emerge.