Clearly their ability to lift is not why there are millions without clean drinking water, for example. You are right that there are difference built-in to huma

Clearly their ability to lift is not why there are millions without clean drinking water, for example. You are right that there are difference built-in to humanity, but we have already overcome those with fairly common technology already. Now inequality is more about who your parents were instead of where you are born or other purely physical problems. We can ship drinking water to anyplace on the planet. We just aren't incentivized to do so. The person leading a team building the roads that will support that effort could be a wheelchair bound parapalegic. Our systems don't need to be perfect they just need to be better than they are now.