Phidias died in prison according to Plutarch; however, he is also credited with the later statue of Zeus at Olympia, therefore this is debated, and another friend of his, Anaxagoras, was attacked by the ecclesia for his religious beliefs. Beyond these initial prosecutions, the ecclesia attacked Pericles himself by asking him to justify his ostensible profligacy with, and maladministration of, public money. According to Plutarch, Pericles was so afraid of the oncoming trial that he did not let the Athenians yield to the Lacedaemonians. Beloch also believes that Pericles deliberately brought on the war to protect his political position at home. Thus, at the start of the Peloponnesian War, Athens found itself in the awkward position of entrusting its future to a leader whose pre-eminence had just been seriously shaken for the first time in over a decade. Peloponnesian War The causes of the Peloponnesian War have been much debated, but many ancient historians lay the blame on Pericles and Athens. Plutarch seems to believe that Pericles and the Athenians incited the war, scrambling to implement their belligerent tactics "with a sort of arrogance and a love of strife". Thucydides hints at the same thing, believing the reason for the war was Sparta's fear of Athenian power and growth. However, as he is generally regarded as an admirer of Pericles, Thucydides has been criticized for bias against Sparta. Prelude to the war Pericles was convinced that the war against Sparta, which could not conceal its envy of Athens' pre-eminence, was inevitable if unfortunate. Therefore, he did not hesitate to send troops to Corcyra to reinforce the Corcyraean fleet, which was fighting against Corinth. In 433 BC the enemy fleets confronted each other at the Battle of Sybota and a year later the Athenians fought Corinthian colonists at the Battle of Potidaea; these two events contributed greatly to Corinth's lasting hatred of Athens. During the same period, Pericles proposed the Megarian decree, which resembled a modern trade embargo. According to the provisions of the decree, Megarian merchants were excluded from the market of Athens and the ports in its empire. This ban strangled the Megarian economy and strained the fragile peace between Athens and Sparta, which was allied with Megara. According to George Cawkwell, a praelector in ancient history, with this decree Pericles breached the Thirty Years' Peace "but, perhaps, not without the semblance of an excuse". The Athenians' justification was