The Spartans deliberately pursued a policy of isolating their community from the outside world. It was aimed at ensuring that foreign customs and customs could not penetrate the "community of equals", but the main reason was that the constant threat of helot uprisings required the mobilization of all forces. Sparta could not lead her army away from the Peloponnese for a long time and far, therefore, in moments of great danger for the entire Hellenic world, she was often guided by purely selfish interests. This was already evident during the period of the Greco-Persian wars, when Sparta was ready to cede to the Iranians (Persians) most of the Balkan Greece and the Greek cities on the coast of Asia Minor. In return, she offered to everyone who wished to move to the territory of the Peloponnese, ready to defend its borders to the last breath.
The thirst for dominance over all of Greece led Sparta to war with the rich and prosperous Athens. She emerged victorious from the Peloponnesian War, but at the cost of betraying the interests of Hellas: having received help from Iran, she turned into an Iranian overseer for the Hellenes. The war brought Sparta out of a state of artificial isolation, victory brought wealth and money, and the "community of equals" entered a period of unrest, like all other Greek policies.