Why do some people have better food, better housing, better neighborhoods, better education, better healthcare, better livelihoods, better entertainment, more political influence, and better treatment under the law?
Ideas create the justification for such disparities — ideas such as worth and division. Simply: disparities exist because ideas that promote disparity are prominent in society.
It’s not that some people are truly deserving and worth more than others, since worth is subjective and changes with era and fashion. Even the boundaries that divide groups vary by period and culture.
Intangible ideas shape the tangible world. So to expunge disparity, society would adopt egalitarian and unifying ideas — because what stratifies society is not scarcity or value, but ideas.