It’s time to meet the smartest man the planet has ever known, William James sidis. Although his IQ is still unknown, experts claim he has an IQ in the 250-300 range (more than double the average).
Although he is widely regarded as the most intelligent man in the world, he did not have a smooth life, creating nothing to match his intelligence. Although he has a very high IQ, but in interpersonal communication and integration into society has a great defect. He died of a stroke at the age of 46.