Reference: Epicurus, Hellenistic period (341-271 BCE), believed that by focusing on the natural things that are important for humans, we can achieve ataraxia - tranquillity.
Definition: Related to the highest good for humankind.
Insight: The "highest good" according to Aristotle must be something valuable in it's own right, rather than a means to an end.
Example: Enough as the virtue between deficiency and excess.
Reference: Aristotle developed the golden mean as a way to think about virtues as the balance between two extremes
Bio: 333-264BCE.
Insight: According to the stoic school there exists a fire or breath (pneutua) in the natural world that produces a rational and morally good order (kosnios). This natural law can be grasped through right reasoning, with a community of moral beings called a cosnropolis.