who advocated the principle of survival of the fittest
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."[1]
John Bradford There is a 19th-century tradition tracing to Bradford the idiomatic "There but for the grace of God go I" as an expression of humility and reliance on God's grace rather than his own morality. The editor of The Writings of John Bradford, Aubrey Townsend, notes this in his preface:[11]
Harlan Howard Howard formulated the oft-quoted definition of a great country song: "Three chords and the truth."[3]
John Dalberg-Acton, 1st Baron Acton He is perhaps best known for the remark in a letter to an Anglican bishop, "Power tends to corrupt, and absolute power corrupts absolutely. Great men are almost always bad men,..."[4] This idea has been tested in laboratory settings.[5]