What is the key question of the euthyphro?

The key question of the Euthyphro dialogue, written by Plato, revolves around the nature of piety and morality. Socrates asks Euthyphro whether something is pious because the gods love it, or if the gods love it because it is pious. This inquiry challenges the relationship between divine command and moral standards, raising fundamental questions about the nature of goodness and the role of divine authority in ethics.