With a higher moral nature will come a restriction on the multiplication of the inferior.


The Principles of Biology, Vol. II (1867), Part VI: Laws of Multiplication, ch. 8: Human Population in the Future - Principles of Biology (1864)


With a higher moral nature will come a restriction on the multiplication of the inferior.

With a higher moral nature will come a restriction on the multiplication of the inferior.

With a higher moral nature will come a restriction on the multiplication of the inferior.

With a higher moral nature will come a restriction on the multiplication of the inferior.