Abraham Lincoln, the 16th President of the United States, is widely regarded as one of the greatest American leaders. Born on February 12, 1809, in a log cabin in Kentucky, Lincoln rose from humble beginnings through self-education and determination. He is best known for his leadership during the Civil War and his efforts to abolish slavery. 

Lincoln's presidency was marked by his commitment to preserving the Union and his eloquence in articulating the principles of democracy and equality.