Abraham Lincoln was the 16th president of the United States, serving from 1861 to 1865. He led the country during the Civil War and preserved the Union while abolishing slavery. Lincoln was an exemplary leader who was a master listener, allowing opposing views without retaliation. He was also a skilled communicator who effectively conveyed his vision for a free America. Additionally, Lincoln demonstrated emotional resilience as president, navigating tough challenges and emotions without compromising his goals.