> And not very long after, 93 per cent of those horses had disappeared.
> I very much hope we'll get the two decades that horses did.
Horses typically live between 25 to 30 years. I agree with OP that most likely those horses were not decimated (killed) but just died out and people stopped mass breeding them. Also as other noticed chart shows 'horses PER person in US'. Population between 1900 and 1950 increased from 1.5B to 2.5B (globally but probably similarly almost 70% increase in US).
I think depends what do you worry about:
1) `that human population decrease 50-80%`?
I don't worry about it even if that happen. 200 years ago human population was ~1 B today is ~8 B. At year 0 AD human population was ~0.250 B. Did we 200 years ago worry about it like "omg human population is only 1 B" ?
I doubt human population decrease 80% because of no demand for human as workforce but I don't see problem if it decrease by 50%. There will short transition period with surplus of retired people and work needed to keep the infrastructure but if robots can help with this then I don't see the problem.
2) `That we will not be needed and we will loose jobs?`
I don't see work like something in demand. Most people hate their jobs or do crappy jobs. What do people actually worry about that they will won't get any income. And actually not even about that - they worry that they will not be able to survive or be homeless. If there is improvement in production that food, shelter, transportation, healtcare is dirty cheap (all stuff from bottom maslov piramid) and fair distribution on social level then I also see a way this can be no problem.
3) `That we will all die because of AI`
This I find more plausable and maybe not even by AGI but earlier because of big social unrests during transition period.
