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 double today’s population by the year 20