据外国媒体的排名，应该是William James Sidis
" Sidis was an American child prodigy whose IQ was never confirmed but believed to be "the very highest that had ever been obtained." He attended Harvard at age 11 and was conversant in roughly 40 languages. In 1925, he wrote 'The Animate and the Inanimate,' in which he discussed the reverse direction operations of the second law of thermodynamics in certain regions of space. He also wrote his own language, Vendergood, at age eight."
威廉·詹姆斯·席德斯是一个美国的神童，虽然智商并没有被正式确认，但是被确信为“从古至今人未企及的高度”。他11岁入学哈佛大学，熟悉大概40种语言。在1925年，他写了一部名为《生命体和非生命体》的书，在这本书中，他论述了热力学第二定律在太空中某特定领域的逆向运用。在他八岁的时候，他还创造了属于自己的一门名叫Vendergood的语言。
Reference
R.J.Farrah.(2014). 20 Smartest People to Ever Exist.Retrieved from http://www.rantlifestyle.com/2014/08/30/20-smartest-people-to-ever-exist/
