Behavioral Pioneers
 
Jacques Loeb
April 7, 1859 - February 11, 1924
German-born American Physiologist
 
Influential on the careers and theoretical perspectives of John B. Watson and B.F. Skinner.  He espoused a very deeply empirical and anti-metaphysical viewpoint--treating empirical investigation as a kind of engineering enterprise. Wrote numerous works on biology and physiology including The Organism as  Whole, From a Physicochemical Viewpoint (1916).