Charles Darwin Survival Of Fittest

Survival of the fittest is a phrase which is commonly used in contexts other than intended by its first two proponents: British polymath philosopher Herbert Spencer(who coined the term) and Charles Darwin.
Herbert Spencer first used the phrase – after reading Charles Darwin's On the Origin of Species – in his Principles of Biology (1864), in which he drew parallels between his own economic theories and Darwin's biological ones, writing, "This survival of the fittest, which I have here sought to express in mechanical terms, is that which Mr. Darwin has called 'natural selection', or the preservation of favoured races in the struggle for life."