>Herbert Spencer, (born April 27, 1820, Derby, Derbyshire, England—died December 8, 1903, Brighton, Sussex), English sociologist and philosopher, an early advocate of the theory of evolution, who achieved an influential synthesis of knowledge, advocating the preeminence of the individual over society and of science over religion. His magnum opus was The Synthetic Philosophy (1896), a comprehensive work containing volumes on the principles of biology, psychology, morality, and sociology. He is best remembered for his doctrine of social Darwinism, according to which the principles of evolution, including natural selection, apply to human societies, social classes, and individuals as well as to biological species developing over geologic time. In Spencer’s day social Darwinism was invoked to justify laissez-faire economics and the minimal state, which were thought to best promote unfettered competition between individuals and the gradual improvement of society through the “survival of the fittest,” a term that Spencer himself introduced.
https://www.britannica.com/biography/Herbert-Spencer
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Herbert Spencer should be on our reading list. He is a natural philosopher quoted by Atkinson.