Karl Popper awarded the Kyoto Prize in Arts and Philosophy for "symbolizing the open spirit of the 20th century"[1] and for his "enormous influence on the formation of the modern intellectual climate".[1]
^Dunbar, R. I. M. (1992). "Neocortex size as a constraint on group size in primates". Journal of Human Evolution. 22 (6): 469–493. doi:10.1016/0047-2484(92)90081-J.