Comment by Jach

It's a broad and simple word but it's also a useful word because of its generality. It's nice to have such a word that can apply to so many kinds and degrees of actions, and saves so many pointless arguments about whether something is more narrowly evil, for example. Applied empirically to people, it has predictive power and can eliminate surprise because the actions of bad people are correlated with bad actions in many different ways. A bad person does something very stupid today, very irresponsible tomorrow, and will unsurprisingly continue to do bad things of all sorts of kinds even if they stay clear of some kinds.