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ThesisItem Open Access Knowledge Attitude and Performance of Rural Development Functionaries Towards Population Education.(Chaudhary Charan Singh Haryana Agricultural Univesity, Hisar, 1980) Pasrija, Pushpa; Sharma, M. L.From ancient time man has reproduced himself at such a pace that earth long ago would have become entirely uninhabitable and homosapiens probably extinct of high mortality had not balanced the fertility. Illness and famine neutralized the high birth rates; war functioned as a further regulator. The Global increase in population Was, therefore, extremely slow until modern time. As they begin to experience the effects of modernization, improvements in nutritional and health standards reduce mortality while fertility remains high and rapid growth ensures. Population problems formally originated in 1798 with an essay on the Principles of Population, by economist Thomas Malthus, Who hypothesized that while technological improvements in productive capacity increase only arithmetically , population size increase geometrically. As a result, population always tend to out strip the weans of subsistence, Until very recently the world's population increased almost imperceptibly. By about the beginning of the Christian era, the earth may have supported 250 million people, but another 1650 years ~ere required for the population to reach an estimated half billion. It took only 200 years more to double that figure, however, and only 80 years more to double it again and reach two billion, the earth 1 s population in 1930. The present total of 3.9 billion may be doubled in only 37 years. This population increase has taken place mostly in Asia, Africa and La.tin America and India is the second most populated, country in the world.