Why was abraham lincoln the best president? need on an essay

Abraham Lincoln was a bad president? Lincoln was this tall gangly lawyer people say He used the blacks and slavery as an excuse to punish the south. The Emancipation Proclamation only freed slaves in the Confederate states. He broke treaties he had with the Souix indians. When elected Rumor has it Buchanan declared he was "the last president of the United States" upon leaving the role. You could do research to prove some of this wrong. I remember dong something like this and it made my essay longer and way better. I realy hope this helps :)

besides the fact that abraham lincoln abolished slavery, and greatly benefit black people, he had a heavy impact of the definition of what democracy was, and should be.