>The US horse population grew from nine million in 1840 to twenty-one million by 1900, seemingly immune to technological change. Within sixty years of the internal combustion engine, the population collapsed by eighty-eight percent.

I think this is a very interesting and chilling point, especially if you draw the parallel literally. For quite some time, I was pondering the question:"Who is buying though?". I.e if you automate workers out of labor, who are we selling these AI services to?

I guess if global population drops by 80-90℅ you suddenly get a "sustainable" economy, as everything is repriced the economy of scale needs a much smaller scale.

(Not speculating this is a plan, just a thought that occurred to me when reading about horses example)

This is already to some extent a solved problem. The top 10% of households in the US for example are 50% of spending, the "horses" to a large extent already don't matter to the economy. This is similar to the relationship between US consumers and workers in undeveloped nations during globalization. Historically this tends to be resolved when it creates an unsustainable level of political instability, but there are many new ways of managing this.

https://libertystreeteconomics.newyorkfed.org/2026/05/tracki...