Who came up with the idea of survival of the fittest?
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: "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."
Who first used the phrase "survival of the fittest"?
Herbert Spencer
Survival of the fittest
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Who came up with underlying principles of the phrase "survival of the fittest"?
Charles Darwin
Survival of the fittest
https://en.wikipedia.org/wiki/Survival%20of%20the%20fittest
Darwin responded positively to Alfred Russel Wallace's suggestion of using Spencer's new phrase "survival of the fittest" as an alternative to "natural selection", and adopted the phrase in The Variation of Animals and Plants Under Domestication published in 1868.[2][3] In On the Origin of Species, he introduced the phrase in the fifth edition published in 1869,[4][5] intending it to mean "better designed for an immediate, local environment".[6][7]
Survival of the fittest
"Survival of the fittest" is a phrase first stated by Herbert Spencer. Spencer used this phrase after reading Darwin's "On the Origin of Species", in his "Principles of Biology" (1864). Herbert stated "This survival of the fittest, which I have here sought to express in mechanical terms, is that which Charles Darwin has called 'natural selection', or the preservation of favoured races in the struggle for life." In 1869, Darwin introduced the phrase in the 5th edition of the "Origin of Species" intending it to mean "better designed for an immediate, local environment".