Most people would willing to sacrifice some number of people to save the life of family or friends; it's human nature to look out for your own. I bet there's a

Most people would willing to sacrifice some number of people to save the life of family or friends; it's human nature to look out for your own. I bet there's a good "trolley problem" study out there about this if you're curious. Edit: I don't know if this one covers friends, but it does cover family and romantic partners. Bleske-Rechek, A., Nelson, L. A., Baker, J. P., Remiker, M. W., & Brandt, S. J. (2010). Evolution and the trolley problem: People save five over one unless the one is young, genetically related, or a romantic partner. Journal of Social, Evolutionary, and Cultural Psychology, 4(3), 115.