Presidential history refers to the study of the leaders of a nation, particularly the President of the United States. This history includes the election, policies, and significant events during each presidency, starting with George Washington, the first president, in 1789. Each president has played a role in shaping the country's laws, culture, and international relations. Throughout U.S. history, there have been 46 presidencies, with notable figures like Abraham Lincoln, who led during the Civil War, and Franklin D. Roosevelt, who served four terms during the Great Depression and World War II. Understanding this history helps to comprehend the evolution of the nation.