Delving into the history of the Spartans is not easy. They left practically no written sources, and everything we know comes from what the ancient Greeks wrote and built over time. In the popular imagination, there is the terrible battle against the Persians, Thermopylae. In the pass of Thermopylae, King Leonidas and three hundred Spartans led seven thousand Greeks to hold back an immense Persian army until reinforcements arrived. Among the Persians were combatants from 46 nations, and the Spartans, according to Aristophanes, fought like furious beasts, with foam running down their jaws and legs.

The Sophists have a bad reputation. Those itinerant teachers were skeptics and relativists, they charged for their lessons and sought to persuade, through one argument or the other, instead of seeking absolute truth, in which they did not believe. Plato and Aristotle despised them.

Daniel Tubau is a philosopher and writer. Publish Seven ways to achieve happiness according to the Greeks (Ariel), where he invites us to abandon slogans and return to the classics to consider what we might consider a happy life today.