The author, relying on the texts of his famous dialogues, on his "History of the Peloponnesian War," first tried to show that Thucydides is an outstanding philosopher of history. Thucydides saw his task in finding the truth, he put forward the idea of ​ ​ a certain recurrence of historical events due to the invariability of certain parameters of human nature. The latter is characterized by a desire for predominance, a thirst for power, greed and ambition. The thirst for freedom is a feeling no less strong than the desire for domination. They generate wars, including civil ones.