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" "Ethics has to recognize the truth, recognized in unethical thought, that egoism comes before altruism. The acts required for continued self-preservation, including the enjoyment of benefits achieved by such acts, are the first requisites to universal welfare. Unless each duly cares for himself, his care for all others is ended by death; and if each thus dies, there remain no others to be cared for.
Herbert Spencer (27 April 1820 – 8 December 1903) was an English philosopher, classical liberal political theorist, and sociological theorist of the Victorian era. He developed an all-embracing conception of evolution as the progressive development of the physical world, biological organisms, the human mind, and human culture and societies. He is known for coining the phrase "survival of the fittest".
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The supporters of the Development Hypothesis... can show that any existing species—animal or vegetable—when placed under conditions different from its previous ones, immediately begins to undergo certain changes fitting it for the new conditions. They can show that in successive generations these changes continue; until, ultimately, the new conditions become the natural ones. They can show that in cultivated plants, in domesticated animals, and in the several races of men, such alterations have taken place. They can show that the degrees of difference so produced are often, as in dogs, greater than those on which distinctions of species are in other cases founded.