First, the primary cause of cities becoming so crowded is economic. As a country develops, its cities become the engines of development, thus jobs are available in these areas. Frankfurt, Istanbul, Bombay and Sao Paolo are all the economic centres of their countries. For example, Tokyo was the motor for Japan’s rapid economic development in the 1960’s and 70’s; as a result, its population increased rapidly. People moved to Tokyo because they could find employment and establish economic security for themselves and their families there.
Second, another factor in the huge increase in urban populations is the socio-cultural factor. Thousands of people migrate to the cities not only for jobs but also for educational and personal reasons. The better universities are always located in big cities and this attracts thousands of students every year, and these students stay on and work in the city after they graduate. Moreover, young people will move to the city as the villages and rural areas are more custom and tradition oriented. Therefore, young people believe this is an obstacle to their personal freedom.
In conclusion, economic and cultural factors are the major causes of huge urban population. People will always move to the areas which provide opportunity and to the places which can give them the freedom they desire.