Which statement best summarizes Zimbardo's persepective on the average person's ability for evil?

Zimbardo proved that the line between good and evil is permeable i.e people can easily move from good to evil if given the right justification for it, if given the right cause or even the right urging.

i don't really know the circumstances. i personally think not due to it not being fair for all parties and how hated i'd become if i thought it was a good thing.