Smartest man who ever lived?? IQ estimated between 250 & 300. Taught himself 8 languages as a child & was eventually conversant ~ 40, invented another & entered Harvard, age 11 (2 yrs later than he wanted). A mathematical as well as linguistic genius and went on to teach classes in geometry and trigonometry in Texas at the age of 17. Sadly he never fulfilled his potential, preferring a lifetime of isolation and privacy. He worked a succession of menial jobs until his death at the age of 46.