it strikes me that today, no developed countries actually have problems feeding their population, nor is its growth heavily dependent on available food.
saying that tokyo produces enough food in its "city radius" to support its population is ridiculous. instead, japan simply imports a lot of food. thus, when the modern age comes around, it should no longer be required to produce enough food to support a population, nor should city growth be dependent on it. rather immigration should control this.
of course, this is heavily dependent on the implementation of a concept, developing nations. either the weaker civs could be reclassified like this, or, a concept which i favor, this less than enviable role would be left to some of the "minor civs", which have been extensively discussed. because of the low birthrate in developed countries, these would no longer have an expanding population by the modern age. only developing nations would have this, and only immigration based on a number of factors could increase the population of a large civilization. food not produced in a developed country would simply be obligatorily bought from developing countries, which would cut off some revenues
saying that tokyo produces enough food in its "city radius" to support its population is ridiculous. instead, japan simply imports a lot of food. thus, when the modern age comes around, it should no longer be required to produce enough food to support a population, nor should city growth be dependent on it. rather immigration should control this.
of course, this is heavily dependent on the implementation of a concept, developing nations. either the weaker civs could be reclassified like this, or, a concept which i favor, this less than enviable role would be left to some of the "minor civs", which have been extensively discussed. because of the low birthrate in developed countries, these would no longer have an expanding population by the modern age. only developing nations would have this, and only immigration based on a number of factors could increase the population of a large civilization. food not produced in a developed country would simply be obligatorily bought from developing countries, which would cut off some revenues