I don't think we are disagreeing here, I'm just saying that I see a future where poor people have to rely on tepary beans to survive as pretty dark. We are talk

I don't think we are disagreeing here, I'm just saying that I see a future where poor people have to rely on tepary beans to survive as pretty dark. We are talking about a wild crop variety that has lower yields, so that could absolutely mean starvation for many at our current population level. There is a lot of inefficient wiggle room in the system, though. Like if we stopped eating so much meat then maybe we could get by on tepary beans if we need to because we wouldn't need to grow so much animal feed. But it would still be a massive decrease in the quality of our diets. I think geoengineering is something we are going to have to do as well, but I worry that the cost and effort involved will make it into something that benefits only the richest humans. Maybe we successfully geoengineer some areas into ideal crop growing conditions again, but that likely leaves the vast majority of humans still suffering the effects of climate change and eating tepary beans, while a few lucky (and likely wealthy) people in geoengineered areas can live with the same standards that we do today.