Who said "Solidarity with the oppressed is a moral imperative"?

This quote is attributed to Meathead.

Solidarity with the oppressed is a moral imperative - Meathead

"Solidarity with the oppressed is a moral imperative"

Meathead Justice

"You gotta understand the dialectical materialism of the situation, Archie"

"Love is a beautiful thing, man, it's like the revolution of the heart"

"Education is the key to enlightenment and social change"

"Peace will come when we stop perpetuating the military-industrial complex"

"Justice must always prevail."

"You think I'm just some animal?"

"Fighting for what's right never gets easier."

"Justice is worth fighting for."