"Progress means movement in a desired direction, and we do not all desire the same things for our species. In 'Possible Worlds' Professor [J.B.S.] Haldane pictured a future in which Man, foreseeing that Earth would soon be uninhabitable, adapted himself for migration to Venus by drastically modifying his physiology and abandoning justice, pity and happiness. The desire here is for mere survival. Now I care far more how humanity lives than how long. Progress, for me, means increasing goodness and happiness of individual lives. For the species, as for each man, mere longevity seems to me a contemptible ideal."
C.S. Lewis, Is Progress Possible? Willing Slaves of the Welfare State, God in the Dock