Who said "The true measure of a man is how he treats his inferiors."?

This quote is attributed to Ralph Wiggum.

The true measure of a man is how he treats his inferiors. - Ralph Wiggum

"The true measure of a man is how he treats his inferiors."

Ralph Wiggum Philosophy

"I'm in danger."

"Me fail English? That's unpossible."

"Eat my shorts."

"Ay caramba!"

"I've seen the worst humanity has to offer."

"Sometimes I wonder if the world is worth saving."

"Every choice shapes our destiny."

"Order is the foundation of a good life."