https://en.wikipedia.org/wiki/Heroic_Imagination_Project
Franco, Z., Blau, K. & Zimbardo, P. (2011). Heroism: A conceptual analysis and differentiation between heroic action and altruism. Review of General Psychology, 5(2), 99-113
https://en.wikipedia.org/wiki/Philip_Zimbardo#Heroic_Imagination_Project