Just as oneness is a biological as well as a spiritual reality, its recognition is a practical necessity as well as a moral imperative. Ties of transportation, communication, and economic interdependence have made the world a very small neighborhood.
Humanity has the technology to make our world uninhabitable in a matter of hours.
The realization is growing that the security of one nation cannot be rooted in the insecurity of another and that the prosperity of one people cannot derive indefinitely from the impoverishment of others. This is made most apparent by studying the global environmental crisis. The greenhouse effect, ozone depletion, air and water pollution, acid rain, soil erosion, salinization, and desertification, deforestation, and depletion of resources are among the threats to the ecosystem that sustains human life and civilization. This crisis has arisen from a very extensive and complex set of interactions among human population growth, economic activity, use of energy and natural resources, and social, cultural, and political forces. The reason for this is the greenhouse effect.