Read the quotation from the Greek philosopher Aristotle. A state which becomes progressively more and more a unity will cease to be a state at all. Plurality of numbers is natural in a state; and the further it moves away from plurality towards unity, the less of a state it becomes. Aristotle believed that the citizens of a successful state must ________________. a) share the same beliefs b) follow the leadership of a dictator c) hold annual elections d) allow for a diversity of opinions