Clearly, it is the time for a global effort to create every where on earth the conditions conducive to stabilizing human population. A set of projections can be arrived at regarding the maximum population that can be supported by the mother earth as a whole, or a particular region or a country, only in conjunction with availability of food, water, extent and nature of pollution, space, energy etc. apart from the climatic and even social and political changes that may take place. Population explosion is one of the major crises the nation is facing. Zero population growth (ZPG) holds the key to the well being and prosperity of the country.
In the course of this enquiry I found that much more had been done than I had been aware of, when I first published the Essay. The poverty and misery arising from a too rapid increase of population had been distinctly seen, and the most violent remedies proposed, so long ago as the times of Plato and Aristotle. And of late years the subject has been treated in such a manner by some of the French Economists; occasionally by Montesquieu, and, among our own writers, by Dr. Franklin, Sir James Stewart, Mr. Arthur Young, and Mr. Townsend, as to create a natural surprise that it had not excited more of the public attention.