Definition
Herbert Spencer (1820–1903) was a prominent British philosopher, sociologist, and classical liberal theorist during the Victorian era. He is best known for his comprehensive theory of evolution, applying it not only to biology but also to psychology, sociology, and ethics. Spencer popularized the phrase 'survival of the fittest' (though Darwin is often mistakenly credited). His work aimed to synthesize all knowledge through evolutionary principles, advocating for minimal government intervention. Think of him as the original systems thinker.