Dear fuck youre stupid. The problem isnt fucking growing the food not existing it aint a fucking famine or blight. Its logistics you dumb motherfucker. The Central Valley here in California could probably grow enough food for most of the US by itself, but doing so requires a large logistics network. This has always been the rule since the first cities, even if back then it was jusy getting it from the fields to inside the city walls. It is exceptionally rare for a city to grow food within itself.