Impiety is when someone does not follow a specific religion. This was done by many saints and philosophers.
Notice it doesn't say that Anaxagoras was "put to death for impiety" on his page it says however that "...He was arrested ... on a charge of contravening the established religion" and that, "It took Pericles' power of persuasion to secure his release. Even so he was forced to retire from Athens to Lampsacus in Ionia..." So In conclusion Someone more learned in Anaxagoras should correct them so they both match up.
Impiety is the act of not following a specified religion (the preferred religion of the time period or location). This act was at some times in history considered criminal. —Preceding unsigned comment added by 188.8.131.52 (talk) 16:56, 11 May 2010 (UTC)