Life expectancy of those in the bottom has gotten quite close to those at the top. Horowitz may have 100000x the amount of money, but he won't live even 2x as long as your average American (or global citizen). https://ourworldindata.org/grapher/life-expectancy
Thankfully educational attainment is also way up
https://ourworldindata.org/grapher/literate-and-illiterate-w...
https://ourworldindata.org/grapher/population-having-attaine...