马尔萨斯理论

Many people criticized Malthus’s theory, but do not forget his words in his work :
If he should succeed in drawing the attention of more able men to what he conceives to be the principal difficulty in the way to the improvement of society and should,in consequence,see this difficulty removed,even in theory,he will gladly retract his present opinions and rejoice in a conviction of his error.
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
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
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.
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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.
Biblioteka Baidu
The power of population is indefinitely greater than the power in the earth to produce subsistence for man
Theory of population growth
(1)Population is necessarily limitted by means of subsistence (2)Population invariably increases where means of subsistence increases unless prevented by some very powerful & obvious checks (3)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