Where more people are crowded into cities, there are more buildings. As more land is built up, structures start getting taller in order to use vertical space, thus intensifying crowding, economic viability, transportation and service problems. This situation leads to environmental stress or discomfort in human beings occupying tall buildings, sometimes even to neuroses, delinquency, and violence.
The changing vertical dimension in relation to human habitations has evolved in importance as a consequence of the worldwide phenomenon of enormous migrations from rural farms to the large industrialized centers, the cities, in a process known as urbanization; which in turn results in the social pressure for more working and living space than is available from the ordinary two-dimensional aspects of these city areas. The tall building solution tends to contribute to the already overwhelming problems of the city and its environment.