A great emigration necessarily implies unhappiness of some kind or other in the country that is deserted.

Malthus married in 1804 and beat three children with his wife

Thirty or forty proprietors, with incomes answering to between one thousand and five thousand a year, would create a much more effectual demand for the necessaries, conveniences, and luxuries of life, than a single proprietor possessing a hundred thousand a year.

It is an acknowledged truth in philosophy that a just theory will always be confirmed by experiment.

To minds of a certain cast there is nothing so captivating as simplification and generalization.

I do not know that any writer has supposed that on this earth man will ultimately be able to live without food.

A writer may tell me that he thinks man will ultimately become an ostrich. I cannot properly contradict him.