Answer:
Abraham Lincoln did believe that slavery was morally wrong, but there was one big problem: It was sanctioned by the highest law in the land, the Constitution. The nation’s founding fathers, who also struggled with how to address slavery, did not explicitly write the word “slavery” in the Constitution, but they did include key clauses protecting the institution, including a fugitive slave clause and the three-fifths clause, which allowed Southern states to count enslaved people for the purposes of representation in the federal government.
In a three-hour speech in Peoria, Illinois, in the fall of 1854, Lincoln presented more clearly than ever his moral, legal and economic opposition to slavery—and then admitted he didn’t know exactly what should be done about it within the current political system.
Abolitionists, by contrast, knew exactly what should be done about it: Slavery should be immediately abolished, and freed enslaved people should be incorporated as equal members of society. They didn’t care about working within the existing political system, or under the Constitution, which they saw as unjustly protecting slavery and enslavers. Leading abolitionist William Lloyd Garrison called the Constitution “a covenant with death and an agreement with Hell,” and went so far as to burn a copy at a Massachusetts rally in 1854.
Though Lincoln saw himself as working alongside the abolitionists on behalf of a common anti-slavery cause, he did not count himself among them. Only with emancipation, and with his support of the eventual 13th Amendment, would Lincoln finally win over the most committed abolitionists.
2. Lincoln didn’t believe Black people should have the same rights as white people.
Though Lincoln argued that the founding fathers’ phrase “All men are created equal” applied to Black and white people alike, this did not mean he thought they should have the same social and political rights. His views became clear during an 1858 series of debates with his opponent in the Illinois race for U.S. Senate, Stephen Douglas, who had accused him of supporting “negro equality.”