Editing 434 BC (section)

== Events ==
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=== By place ===
==== Greece ====
* Under the leadership of [[Pericles]], [[Athens]] introduces a series of measures (the "[[Megarian decree]]") imposing an economic embargo on [[Megara]] for violations of land sacred to [[Demeter]]. According to the provisions of the decree, Megarian merchants are to be excluded from the market of Athens and the ports in its empire. This ban strangles the Megarian economy and strains the fragile peace between Athens and [[Sparta]], which is allied with Megara.
* Philip, brother of [[Perdiccas II of Macedon]] challenges Perdiccas for the throne, and enlists the support of [[Athens]] and King Derdas of Elimea. Perdiccas responds by stirring up rebellion in a number of Athenian [[tribute]] cities, including [[Potidaea]].
* [[Anaxagoras]] is arrested by Pericles' political opponents on a charge of contravening the established dogmas of Athenian religion. It takes Pericles' power of [[Public speaking|oratory]] and persuasion to secure his release, and even then, he is fined and forced to retire from Athens to [[Lampsacus]] in [[Ionia]].

=== By topic ===
==== Mathematics ====
* While in prison, [[Anaxagoras]] tries to [[square the circle]] with [[straightedge]] and [[Compasses (drafting)|compasses]].
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