Choose one of the theorists who have made both a historical and current contribution to psychology and learning. 
Aristotle
Rene Descartes
John Waston
Ivan Pavlov
Clark Hull
Edward Tolman
Albert Bandura
Edward Thorndike
Albert Ellis
Ivar Lovass
Mary Cover Jones
Feel free to choose someone else, if you want, however, reach out to me so I can confirm who they are if they are not on this list.