Mill argues that happiness is the sole basis of morality, and that people never desire anything but happiness.
He supports this claim by showing that all the other objects of people's desire are either means to happiness, or included in the definition of happiness.
He argues that pleasure can differ in quality and quantity, and that pleasures that are rooted in one's higher faculties should be weighted more heavily than baser pleasures.
Furthermore, Mill argues that people's achievement of goals and ends, such as virtuous living, should be counted as part of their happiness.
Some philosophers, feeling the force of these objections, have proposed replacing utilitarianism about future generations with an egalitarian view.