"The Greeks thought of culture as character. It was predictability across scale: the behavior of a city, a state, or a people in small things, big things, and those in between. 32 Knowing who they were and what they wanted, the Spartans were wholly predictable. They saw no need to change themselves or anyone else. The Athenians' strategy of walling their cities, however, had reshaped their character, obliging them restlessly to roam the world. Because they had changed, they would have to change others--that's what having an empire means--but how many, to what extent, and by what means? No one, not even Pericles, could easily say. Pericles was not Xerxes. "I am more afraid of our own blunders than of the enemy's devices," he admitted as war approached. Knowing that the Athenians' empire could not expand indefinitely, Pericles "unsparingly pruned and cut down their ever busy fancies," Plutarch explained, "supposing it would be quite enough for them to do, if they could keep the [Spartans] in check." 33 But as Pericles' agents acknowledged before the Spartan assembly, allowing the empire the equality he celebrated within the city could cause contraction, perhaps even collapse."