Herbert Spencer was an English philosopher, scientist, engineer, and political economist. In his day his works were important in popularizing the concept of evolution and played an important part in the development of economics, political science, biology, and philosophy.

Herbert Spencer was born in Derby on April 27, 1820. His childhood, described in An Autobiography (1904), reflected the attitudes of a family which was known on both sides to include religious nonconformists, social critics, and rebels. Spencer's father, a teacher, and an uncle saw that he received a highly individualized education that emphasized the family traditions of dissent and independence of thought. He was particularly instructed in the study of nature and the fundamentals of science, neglecting such traditional subjects as history.

Spencer initially followed up the scientific interests encouraged by his father and studied engineering. For a few years, until 1841, he practiced the profession of civil engineer as an employee...