Overpopulation and the Economical Effects Currently there are more than 6 billion people living in the world and this number is expected to double in a short period of time. Many researchers and theorists feel that the world does not have a carrying capacity for this amount of people. The overpopulation of the world, brings a fear of overcrowding and an apprehension that the resource base will become to low, perhaps even non-existent. In 1900, the world population was 1.6 billion people. Compared to the 6.1 billion that it is today, that population is miniscule. The population is projected to reach 16.4, more than dou