Socialist cities make the same demands on rural areas that capitalist cities do. It’s primarily a function of population density, not economic model.
At best, a square mile of farmland can feed about 6000 people. That’s under ideal conditions and assuming vegetarians. Want a little meat in your diet, and 2500 is a more realistic number.
A square mile of Chicago contains about 12,000 people. That’s 2 to 4.8 square miles of farmland for every square mile of city. Chicago is about 230 square miles.
A square mile of New York contains about 30,000 people. That’s 5 to 12 sq miles of farmland for every square mile of city. New York is about 300 square miles.
A square mile of Paris contains about 53,000 people. 8.8 to 21.2 sq miles of farmland for every square mile of city. Paris is about 40 square miles.
Yep, each area needs two dots, one red, one blue, sized proportional to their votes.
Florida will get quite a bit bluer, but California and the northeast will get much redder.