corruption
willingness to hurt others willfully in order to gain a personal advantage
to me this is the root of all evil (and since money symbolizes power in our society, therefore money is of course the root of all evil)
this is a subjective measure (there are infinitely many ways of specifying various ethical "rules" -- what I aim to describe here is how an individual's actions indicate contempt for other citizens of the planet (to take a personal example, by buying cheap clothes made by sweatshop labor somewhere or by burning too much gasoline commuting in a huge oversized truck)) --- of course getting accurate date is quite tough, as people are going to instinctively hide their own hypocrisy