Euripides (c. 480 – c. 406 BC) was a tragedian of classical Athens. Along with Aeschylus and Sophocles, he is one of the three ancient Greek tragedians for whom any plays have survived in full. Some ancient scholars attributed ninety-five plays to him, but the Suda says it was ninety-two...
All that is necessary for the triumph of evil is that good men do nothing.
The evil of the world is made possible by nothing but the sanction you give it.