This article explores Spinoza's distinctive contribution to the eudaimonistic tradition, which considers happiness (eudaimonia) to be the highest good. Most (if not all) ancient eudaimonists endorse some sort of hierarchy between mind and body, where one is always dependent on, or subordinate to, the other. In particular, many of them endorse ethical intellectualism, where mental things are considered more valuable than bodily ones. I argue that Spinoza, in contrast, considers mind and body ontologically and ethically identical and equal, thereby bringing (...) something new to this ethical tradition. (shrink)