History of the Peloponnesian War

Again, wherever there were tyrants, their habit of providing simply for themselves, of looking solely to their personal comfort and family aggrandizement, made safety the great aim of their policy, and prevented anything great proceeding from them; though they would each have their affairs with their immediate neighbors. All this is only true of the mother country, for in Sicily they attained to very great power. Thus for a long time everywhere in Hellas do we find causes which make the states alike incapable of combination for great and national ends, or of any vigorous action of their own.