Apparently, almost all of us living on Earth are the results of specific Bardo Thodol events, that led us here. We all failed to get to the higher realms. Except of course those who voluntarily chosen this place to serve and educate. And those for whom this realm is actually a promotion. We were all reborn.
Considering the countless number of realms, wouldn't it make more sense for people to be much similar in nature being born in one place? Does it mean that all the differences (smart/dumb, greedy/generous, kind/evil, materialistic/non-materialistic, spiritual/ignorant, educated/illiterate...etc) are less important, than something fundamental that unifies us? what is it then? Lust? desires? Outside world is the result of one's development and ultimate true nature of the beings here, so we all deserve what we have? Why such gigantic variety and number of variables? to increase the choice selection for the next life?