What sets human beings apart from animals is not the pursuit of happiness, which occurs all across the natural world, but the pursuit of meaning, which is unique to humans.
Roy BaumeisterViolence appears to be most commonly a result of threatened egotism -- that is, highly favorable views of self that are disputed by some person or circumstance. ... violence is perpetrated by a small subset of people with favorable views of themselves. ... Viewed in this light, the societal pursuit of high self-esteem for everyone may literally end up doing considerable harm.
Roy Baumeister