Hey, its from wiki but sure doesnt sound to me like he had a whole lot to do with starting the war.
.In the presidential election of 1860, the Republican Party, led by Abraham Lincoln, had campaigned against the expansion of slavery beyond the states in which it already existed. The Republican victory in that election resulted in seven Southern states declaring their secession from the Union even before Lincoln took office on March 4, 1861. Both the outgoing and incoming US administrations rejected the legality of secession, considering it rebellion.
Hostilities began on April 12, 1861, when Confederate forces attacked a US military installation at Fort Sumter in South Carolina. Lincoln responded by calling for a volunteer army from each state, leading to declarations of secession by four more Southern slave states