Theodore Roosevelt, born in 1858, was an American statesman, author, explorer, and 26th President of the United States. Known for his energetic and progressive leadership, he promoted conservation and trust-busting policies. Roosevelt was a Rough Rider during the Spanish-American War and received the Nobel Peace Prize for mediating the Russo-Japanese War. A prolific writer, he authored numerous books on politics, history, and nature. Roosevelt's legacy includes expanding national parks and advocating for social reform. He passed away in 1919, leaving a lasting impact on American history.