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I don't think there will be one. We're extremely close to taking control of our genes in a very direct way, why would we continue leaving it up to nature?
Also, there's just really no longer any natural selection in humans. Basically all of us last through breeding years now. So other than selecting out acute health issues and normal mate selection, there's not much going on.
That's about to reverse though. I think during the climate apocalypse, eventually humans will no longer have access to things like vision correction, wheelchairs, antibiotics and other medicines, surgeries, etc. They will also be dealing with lower nutrient intakes.
I think there IS still natural selection in humans, and it is relatively new: birth control.
I suspect that those with religious/conservative beliefs who will not take morning-after or birth control pills AND those irresponsible people who theoretically might -- but didn't think about it until too late -- will be two groups that increase their numbers while more responsible/fore-thinking people and those without moral objection to the pill (or perhaps WITH moral objection to overpopulating the planet) will be more likely to cap their number of offspring. Yes, this was kinda covered in the movie Idiocracy, but I don't think it was that far off.
Well I hope we can engineer better spines because it makes no sense for our brains to just finish developing a few years before our backs give out
What makes you think taking control of our genes is somehow not part of our evolution?