Ekistics is the science in which the human settlement is conceived as an organism having its own laws. Through the study of the evolution of human settlements from their most primitive phase to megalopolis and ecumenopolis (predicted future city with related open land area which will cover the entire earth as a continuous living system forming a universal settlement), ekistics develops the necessary interdisciplinary approach necessary to its problems. The five ekistic elements which compose human settlements are: nature, anthropos, society, shells, and networks (roads, water supply, electricity) (men and women equally) (all types of structures within which anthropos lives and carries out various functions).