"But perhaps the most historically accurate of Socrates' offenses to the city was his position as a social and moral critic. [...] insofar as he irritated some people with considerations of justice and the pursuit of goodness. His attempts to improve the Athenians' sense of justice may have been the source of his execution."
[Edit] http://en.wikipedia.org/wiki/Socrates#Trial_and_death
"But perhaps the most historically accurate of Socrates' offenses to the city was his position as a social and moral critic. [...] insofar as he irritated some people with considerations of justice and the pursuit of goodness. His attempts to improve the Athenians' sense of justice may have been the source of his execution."