Philip Zimbardo — American Psychologist born on March 23, 1933,

Philip George Zimbardo is a psychologist and a professor emeritus at Stanford University. He became known for his 1971 Stanford prison experiment and has since authored various introductory psychology books, textbooks for college students, and other notable works, including The Lucifer Effect, The Time Paradox and The Time Cure. He is also the founder and president of the Heroic Imagination Project... (wikipedia)

I'm saying to be a hero is means you step across the line and are willing to make a sacrifice, so heroes always are making a sacrifice. Heroes always take a risk. Heroes always deviant. Heroes always doing something that most people don't and we want to change - I want to democratise heroism to say any of us can be a hero.
That human behavior is more influenced by things outside of us than inside. The 'situation' is the external environment. The inner environment is genes, moral history, religious training.
Situational variables can exert powerful influences over human behavior, more so that we recognize or acknowledge.
The line between good and evil is permeable and almost anyone can be induced to cross it when pressured by situational forces.
What troubles me is the Internet and the electronic technology revolution. Shyness is fueled in part by so many people spending huge amounts of time alone, isolated on e-mail, in chat rooms, which reduces their face-to-face contact with other people.