Ephialtes
Ephialtes was the reformer who initiated the final transformation of Athens into a radical democracy. He was strongly opposed by the conservative Athenian upper classes, who, under the leadership of Cimon, son of Miltiades, had the upper hand and controlled the Assembly. That changed when, in 464 BC, Sparta appealed to Athens for help in suppressing a Helot serf revolt. Over Ephialtes’ strong objections, Cimon carried the day and convinced the Assembly to send an Athenian force to help Sparta, but when they arrived, the Spartans changed their minds, and fearing that their democratic notions might infect their remaining Helots and inflame them into joining the revolt, sent the Athenians back.
In the ensuing outcry, Cimon’s humiliated faction lost credibility, and leading conservatives were put on trial for corruption. Ephialtes engineered Cimon’s ostracism and exile assumed the mantle of Athenian leadership and launched his program of radical reforms. His greatest reform was to emasculate the Areopagus, a council of city elders similar to the Roman Senate, comprised of those who had held high public office, and that was more conservative than the citizen Assembly. It served as Athens’ highest tribunal, with jurisdiction over all cases, including constitutional review of the Assembly’s enactments, which effectively gave the Areopagus a legislative veto over the more democratic Assembly.
Ephialtes stripped the Areopagus of nearly all its powers, transferring them to more democratic bodies whose membership was drawn by lot, such as the Boule and the Heliaia. The Areopagus’ remit was narrowed to jurisdiction over murder and arson cases. He also reduced property qualifications for officeholders and introduced pay for the holders of public office, enabling poorer citizens to hold offices that previously had been the preserve of the wealthy.
Ephialtes’ reforms were strongly resented by the oligarchic faction, who had him assassinated in 461 BC. His deputy, Pericles, took the leadership reins, and completed Ephialtes’ agenda, finalizing the transformation of Athens into a direct democracy.