Cities Are Overcrowded, The World Is NotHow can this be proved? Easy: Conditions of apparent overpopulation only exist in cities, not in rural areas.he urban population is on the rise. (see graph here)Since 2008, more than half of humanity has become urbanized. The reason is because there are more opportunities to make money in the city than in the countryside. A city is crowded because people come from miles and miles away to move there, not because of wreck-less reproduction and overpopulation.