The Sophists.

As Athens grew in influence, it attracted more and more people from other city-states and countries. Opportunities for a growing number of Athenians to speak before the Assembly created a demand for specialized education in subjects such as letters, rhetoric, science, statesmanship, and philosophy. Those who considered themselves as original, true Athenians became increasingly ethnocentric. The sophists were the first true professional educators, a group of wandering teachers who charged a fee to teach anyone …

…guided "internally." According to Aristotle, the good is "that at which all things aim." The good at which all things aim is their own entelechy. Happiness requires activity, good habits, and practical wisdom. Sophists. Internet Encyclopedia of Philosophy. < www.utm.edu/research/iep/s/sophists > The Sophists. < www.ablemedia.com/ctcweb/netshots/sophists.htm > The Philosophy of the Sophists. < www.radicalacademy.com/philsophists >