Ambush
"How many in your village before the winter? Seems to me a village can get by pretty well on stone soup, if everyone has a little of something. A turnip here, an onion there, a rabbit or chicken, a handful of barley, and next thing you know you find out everyone had enough to feed everyone, even though no one had enough to feed themselves.
"But that only works if folks are willing to cooperate. If they're hoarding against their neighbors, then people can starve when there's food enough for all, if only it were divided equally."