Cool; okay. In the same way that people use "cool" when they really mean "okay," people (mostly African American) said "righteous" in the late 70's and early 80's. It was then picked up by the white mainstream and quickly became part of Valley Girl lingo.
As kids nobody was more righteous, no group was more righteous. So when did females become more righteous than males in middle school? When did black guys become more righteous than white guys in college? When did the LGBT community become closer to god's spiritual core than the rest of the population at birth? As kids there was no such thing as more righteous.
Some females claim to be more righteous than males, some black folks claim to be more morally righteous than white folks. Nobody was more righteous as a kid.