Ludwig Wittgenstein
Ludwig Wittgenstein (1889-1951) 1
Karl Popper
Karl Popper (1902-1994) 2
Martin Buber
Martin Buber (1878-1965) 3
Paul Edwards
Paul Edwards (1923-2004) 4
Arthur Koestler
Arthur Koestler (1905-1983) 5
Paul Feyerabend
Paul Feyerabend (1924-1994) 6
Ernest Nagel
Ernest Nagel (1901-1985) 7
Yehoshua Bar-Hillel
Yehoshua Bar-Hillel (1915-1975) 8
Erik von Kuehnelt-Leddihn
Erik von Kuehnelt-Leddihn (1909-1999) 9
Gustav Bergmann
Gustav Bergmann (1906-1987) 10
Herbert Feigl
Herbert Feigl (1902-1988) 11

Ranked by popularity based on boosts and other user activity.