We currently produce too much food. The issue is geopolitical nonsense getting in the way of distribution. (We can agree that Fiat is the cause of most of that, yes?) even at 10 billion (the approximate global maximum based on population tendencies and projections I've seen, +/- half a billion), we can produce enough decent food for people to not starve on the land we already use for farming, though, I propose we move to a decentralized, distributed food system, which will prove more robust, diverse, flexible and healthier than industrial monocropping which is poisoning the earth, the air, the water, and us.