Isn't inequality just a polite word for jealousy? We're all peasants compared to some possible future generations 100 years in the future with all their cancer cures and Mars holidays.
It's a real shame, because it is literally impossible to solve a problem you deliberately misunderstand. That's humans for you though.
Don't play dumb. They're going to break down crying when they're told what our planet went through right now. It will be like when today's children are made to really look at photos of Auschwitz, or the Syrian Civil War, or guinea-worm cases in Africa, or child labor in coal mines.
Oh wait, some of those things are still present-day problems.