Malthusianism 马尔萨斯人口论介绍.ppt

The power of population is indefinitely greater than the power in the earth to produce subsistence for man Theory of population growth Population is necessarily limitted by means of subsistence Population invariably increases where means of subsistence increases unless prevented by some very powerful obvious checks These checks,which repress the power of population growth,and keep its effects on a level with the means of subsistence are resolvable into moral restraint(chastity),vice(birth control,postponement of marriage)misery(starvation) Proposed solutions Malthus argued that two types of checks hold population within resource limits positive checks include hunger, disease and war preventive ones abortion, birth control, prostitution, postponement of marriage and celibacy * * Population is severely limited by means of survival When the means of subsistence increases, the population also increased, and Increased population pressure stimulates production In the long term, production growth potential can not keep pace with population growth, population and ability to support a huge rift between the bound His theory is negative,but far-reaching. Malthusianism The Malthusianism is the population theory created by Thomas Robert Malthus. AN ESSAY ON THE PRINCIPLE OF POPULATION In 1798, Thomas Malthus published An Essay on the Principle of Population, describing his theory of quantitative development of human populations. The two principles in the essay Firstly, food is necessary to the existence of man. Secondly, the passion between the sexes is necessary and will remain nearly in its present state. Limitation: It can not reflect the social reason of the population phenomenon It can not foresee modern science and technology in improving agriculture,industry production and the scientific birth control * Population is severely limited by means of survival When the means of subsistence increases, the population also increased, and Increased popula