Who was the philosopher that believed virtue is a form of knowledge and that people act immorally due to ignorance?

What concept did Plato explore in "The Republic" to show why people should act justly?

Which philosopher is known for saying "Man is the measure of all things," suggesting that morality is relative to each society’s values?

What did the Sophists believe about ideas of good and bad?

Which of the following ideas was promoted by Pythagoras as a moral stance?

In Plato’s philosophy, what did justice lead to within the soul?