Coercion is efficient but that is slavery. Kindness is efficient also but that is voluntary. If everyone voluntarily did what they could and did their best while having fun world peace would already exist. But we are not kind people we do not help one another we only extort each other that is why this is a planet of War and the children of Earth are in competition. The judgments of worth and genocide has been going on since our existence because we have yet to evolve into the peaceful beings Worthy of making World Peace our reality.  We are no better than animals tearing at one another's throats.