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‘Now-a-days most naturalists are more Darwinian than Mr. Darwin himself.’


The Factors of Organic Evolution is a synthesis of Charles Darwin’s theory of evolution and Herbert Spencer’s development on various psychological and social subjects. While the direct focus of this book is on biology, the book also deals with the subjects of psychology, sociology, and ethics. Spencer’s thorough understanding of Darwin’s theory provides readers with a comprehensive introduction to the theory of evolution while also introducing readers to Spencer’s own philosophy.


Herbert Spencer was an English sociologist, philosopher, and biologist. He was one of the most influential intellectuals of the 19th century and is best known for contributing to the doctrine of Social Darwinism and coining the term “survival of the fittest”.