The main peculiarity which distinguishes man from other animals is the means of his support-the power which he possesses of very greatly increasing these means.

The power of population is indefinitely greater than the power in the earth to produce subsistence for man.

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.

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

The superior power of population cannot be checked without producing misery or vice.

It is what makes us human, what distinguishes us from other animals. We can be aware of being aware.