Health. :)

Install StreetComplete and put some of them in. Spread the word, it’s really low effort.

Two failed harvests. That’s what it takes to strip away the thin varnish of civilisation.

Considering the global integration of the world today, in that case much of the effects can be temporarily cushioned by spending lots of money, thereby letting the ones without money starve. Either way, it won’t be pretty.

At some point, even money can’t help anymore, because you can’t eat it. If there is no food, there is no food.