Hubris is defined by Wikipedia to mean, “in a modern context, extreme pride or self-confidence; in its ancient Greek context, it typically describes violent and excessive behavior rather than an attitude. When it offends the gods of ancient Greece, it is usually punished.” Such was the fate of Plato’s Atlantis.
George Sarantitis has drawn attention to the fact that the offence of hubris and its consequences “is referred 26 times throughout the Odyssey and 4 times throughout the Iliad”. This is just one example of the Homeric influence on Plato, a subject dealt with at length by Bernard Suzanne(a).
One doctor has identified political hubris as a medical disorder(b).