The Athenians, who had made so much of him before, now turned against him, and made a law to punish with death anyone who should speak of making peace with him.  However, Cassander died, and his sons quarrelled about the kingdom, so that Demetrius found it a good opportunity to return to Greece, and very soon made the Athenians open their gates to him, which they did in fear and trembling; but he treated them so mercifully that they soon admired him as much as ever.