Once the availability of food declines people will decide to do something about it. The only question is is it then too late? Or is it to late for some and not others?
https://www.chinadialogue.net/article/show/single/en/5193-De...
Just look at all other cases of man made disasters all were known to be around long before it happened and nothing was done to prevent them.
This ignores the would-be disasters that were prevented.now i don't know any of the top of my head and i imagine that they would be hard to find as they would get less press.