Progress is not an accident, not a thing within human control, but a beneficent necessity . . . due to the working of a universal law. So surely must the things we call evil and immorality disappear; so surely must man become perfect.
This survival of the fittest which I have here sought to express in mechanical terms, is that which Mr. Darwin has called "natural selection, or the preservation of favoured races in the struggle for life."
Herbert Spencer (1820 - 1903)
Source: Principles of Biology. Indirect Equilibration.