utilitarinism is a form of consequencialism, it defines the right of actions based on their effects and produces the best consequences
maximizing happiness ; the best possible consequences according to john stuart mill
intrinisic value has value in itself without needing the world to determine it's worth
consequentialist consider the intentions are irrelevant and the nature of the action is irrelevant too
deontology states the belief that the consequences don't matter, and only the intention does
according to mill; an action is right if and only if it would likely produce as least as high a utility
(net balance of happiness vs. unhappiness) as would any other alternative action that one might have performed instead