Frequently Asked Questions. These issues helped to form the social and moral foundations of a young Abraham Lincoln. He struggled with the ideals put forth by the Declaration of Independence as the issue of slavery in the South contradicted them. Lincoln’s morals led him to believe that slavery in the South was both “morally and economically unjust.”[19] These thoughts remained a constant throughout his life and influenced his governmental policies and politics. Abraham Lincoln Birthplace NHP maintains that Abraham Lincoln was born on the Sinking Spring Farm in Kentucky, February 12, 1809. What proof do we have to offer visitors who challenge this claim? Below is a direct quote from Abraham Lincoln written in 1859 while preparing to run for president in the 1860 election. Frequently Asked Questions - Abraham Lincoln Birthplace National Historical Park (U.S. National Park Service)