1. William James Sidis – IQ 250 – 300

The brilliant William James Sidis enrolled into the prestigious Harvard University when he was just 11 years old, to study mathematics. At the time of his enrollment, he was the younger student to ever enter Harvard. He was still a young man when he started teaching, but because the small age-gap, he had serious issues reaching his students who didn’t always took kindly to him. He would later participate in socialist movements, getting in quite a bit of trouble with the law as a result. Because of his attitude, his parents would later confine him to a sanatorium in an attempt to reform his political views. After his release in 1921, William strayed away from academia and lived a rather normal life until his death at the age of 46 following a brain hemorrhage.