Zimbardo, who officially retired in 2003, gave his final "Exploring Human Nature" lecture on March 7, 2007, on the Stanford campus, bringing his teaching career of 50 years to a close.
Zimbardo, som officielt trak sig tilbage i 2003 – efter 50 år som underviser, gav hans sidste "Exploring Human Nature" forelæsning den 7. marts, 2007, på Stanford campus.