Harry S. Truman – IQ 139.8

Harry S. Truman is best known for leading the American nation through two of the World Wars and the beginning of the Soviet-era Cold War. Well, we think that it would be fair to say that Truman was thrown-deep in rather suddenly. Interestingly, he only had weeks as the Vice President before becoming the President following Roosevelt’s demise.

After taking charge of the White House, Truman told the news reporters that he felt like the whole universe fell on him. We would say that he performed well despite the massive burden for a man with an IQ of 139.8.