George Sylvester
Morris

Johns Hopkins (Philosophy Tree)


Charles Sanders
Peirce

Johns Hopkins (Philosophy Tree)


Herbert Baxter
Adams

Johns Hopkins (History of History Tree)




John
Dewey

Columbia (PsychTree)


Oswald
Külpe

University of Wurzburg


Karl
Bühler

Vienna University (PsychTree)


Goodwin
Watson

Columbia (PsychTree)


Eugen
Bleuler

Universität Zürich


Hermann
Rorschach

(PsychTree)


Richard
Huelsenbeck

(PsychTree)


Albert
Ellis

(PsychTree)

Paul
Eddy

Columbia
(Options)

Sheldon H.
Rifkin

University of Tennessee

K.C.
Hewitt

Mercer University

Paul EddyX