This survival of the fittest implies multiplication of the fittest.{The phrase ‘survival of the fittest’ was not originated by Charles Darwin, though he discussed Spencer’s ‘excellent expression’ in a letter to Alfred Russel Wallace (Jul...

The publication of the Darwin and Wallace papers in 1858, and still more that of the ‘Origin’ in 1859, had the effect upon them of the flash of light, which to a man who has...

I fully agree with all that you say on the advantages of H. Spencer’s excellent expression of ‘the survival of the fittest.’ This, however, had not occurred to me till reading your letter. It is,...