Hume is sometimes thought to have held the view that all behavior is motivated by desire, but who nonetheless allowed that such desires – and so the behavior they generate – could be altruistic.
Against such a view, we might worry that it is not genuine altruism to help another if you do so only because you want to. Isn’t doing what you want precisely the opposite of altruism? Defenders of this view respond that this objection misunderstands altruism – altruism is a matter of being motivated by the right desires (e.g. desires for others’ wellbeing), not a matter of not being motivated by desires at all.