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

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

Population, when unchecked, increases in a geometrical ratio.

Population, when unchecked, increases in a geometrical ratio

Population, when unchecked, goes on doubling itself every 25 years or increases in a geometrical ratio.

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.