Theodore Roosevelt

Theodore Roosevelt Jr., often referred to as Teddy or by his initials, T. R., was an American politician, statesman, conservationist, naturalist, and writer who served as the 26th president of the United States from 1901 to 1909. He previously held various positions in New York politics, rising up the ranks to serve as the state's 33rd governor for two years. He later served as the 25th vice president under President William McKinley for six months in 1901, assuming the presidency after McKinley's assassination. As president, Roosevelt emerged as a leader of the Republican Party and became a driving force for anti-trust and Progressive policies.
A sickly child with debilitating asthma, Roosevelt overcame his health problems by embracing a strenuous lifestyle. He integrated his exuberant personality and a vast range of interests and achievements into a "cowboy" persona defined by robust masculinity. He was home-schooled and began a lifelong naturalist avocation before attending Harvard College. His book The Naval War of 1812 established his reputation as a learned historian and popular writer.