Abstract
The main objective of this lecture is to present a background understanding for the current endeavor to change the course of the humanospheric evolution. In order for every human being to lead a happy life, physical conditions such as adequate supply of fresh water and foods, no shortage of materials that are essential for our modern living, sufficient control over poisons and diseases that infect us and our environments, and securing enough energy sources that last forever are prerequisite. Obviously, we need to develop new technologies, new societal systems, and new lifestyles to achieve these. However, it should be emphatically stressed that these conditions and the three new subjects (technology, social system, and lifestyle) are only desirable as far as they make it possible to provide everybody with a happy life. The evolution of global material cycles, current status of material and energy exchange between the biosphere and the humanosphere, and four rules of ecology are discussed in this context. On the analogy of human relationship between young and olds, the reduction of the exchange between young humanosphere and old global life support system is proposed to be the most urgent target.
