" Man is a glorious and unique species of animal. The species originated by evolution.... Future evolution could raise man to superb heights as yet hardly glimpsed, but it will not automatically do so. As far as can now be foreseen, evolutionary degeneration is at least as likely in our future as is further progress.The only way to ensure a progressive evolutionary future for mankind is for man himself to take a hand in the process. Although much further knowledge is needed, it is unquestionably possible for man to guide his own evolution (within limits) along desirable lines. But the great weight of the most widespread...beliefs and institutions is against even attempting such guidance. [" Man's evolutionary future," 1960, p. 134.] "