The power of population is indefinitely greater than the power in the earth to produce subsistence for man.
From Thomas Malthus
Population, when unchecked, goes on doubling itself every 25 years or increases in a geometrical ratio.
The superior power of population cannot be checked without producing misery or vice.
A great emigration necessarily implies unhappiness of some kind or other in the country that is deserted.
I think it will be found that experience, the true source and foundation of all knowledge, invariably confirms its truth.
In a state therefore of great equality and virtue, where pure and simple manners prevailed, the increase of the human species would evidently be much greater than any increase that has been hitherto known.
The rich, by unfair combinations, contribute frequently to prolong a season of distress among the poor.
I do not know that any writer has supposed that on this earth man will ultimately be able to live without food.
The constant effort towards population, which is found even in the most vicious societies, increases the number of people before the means of subsistence are increased.
The histories of mankind are histories only of the higher classes.
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