https://www.businessinsider.com/sinister-hunger-stones-dire-warnings-surfaced-europe-2018-8?utm_source=reddit.com

One on hand, this whole story unnerves the shit out of me, and I'm not easy to unnerve with mere history. On the other, somebody cleverer than I could spin one hell of a dark fantasy screenplay out of these "hunger stones."

@zebratron2084 One cyclical thing about history: When people got desperate, like from water levels being too low, people grew more violent and we see conflicts at the same time. The "Mayan Collapse" came about -- according to one theory -- because of changing climate; less farms available, so take more farms from others. Then fortify for war, but can't fortify farms. Mass starvation.