The problem is that we live too long. If we died at 40 that would be one thing. But it is very hard to survive late in life on one’s personal productivity, in a world of increasing competitiveness given the rest of the world is no longer so intellectually, technologically, and institutionally far behind. And so larger and larger households will likely continue to evolve, and mobility will decrease since the absurdities of the 20th century are no longer possible.
The likely scenario is that the wealthy and able will insulate themselves behind automatons that do not have to be incentivized and the rest of mankind will revert to near animal barbarism.
That is the next source of speciation that I see on the horizon.