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Gradually, by selective breeding, the congenital differences between rulers and ruled will increase until they become almost different species. A revolt of the plebs would become as unthinkable as an organized insurrection of sheep against the practice of eating mutton.

Bertrand Russell (2015). “The Impact of Science On Society”, p.44, Lulu Press, Inc
Gradually, by selective breeding, the congenital differences between rulers and ruled will increase until they become almost different species. A revolt of the plebs would become as unthinkable as an organized