Theodore Roosevelt had a privileged upbringing but was sickly as a child. He became interested in the outdoors and nature, which helped him become physically strong. As president, Roosevelt conserved land and established national parks. He had a successful presidency but later grew angry with his successor's policies. Roosevelt attempted to run against the incumbent president as a third party candidate but lost the election. He had a life of accomplishments but also faced adversity, including the death of his son during World War I.