Comparative Social Psychology Theorist Essay Throughout my essay I will be comparing the two theorists Zimbardo and Reicher/Haslam on their research into the Psychology of Tyranny and Evil. The research that they conducted was important to social psychology as it showed the effects that can occur when people are placed into a role. Even though the conclusions they presented where important, their studies, particularly Zimbardo’s was seen as controversial as not all ethical principles were adhered