It is a relatively safe and cost-effective procedure. Whether society should encourage it must inevitably be decided by issues of both quality of life and morality. Thus, preventing the birth of an individual whose life would be seriously substandard seems relatively easy to defend, while preventing a birth just on sex alone, or other frivolous characteristics, seems mor-ally reprehensible. Genetic research will produce the knowledge of how to improve the genetic makeup of the human species. I think the question can be answered only from an evolutionary perspective.
Evolution operates at the level of the species.
It ensures that the most fit species survive and prosper. . . . Mankind is already master of its evolution by environmental control. I find this a terribly difficult question, and I am relieved by the realization that it will probably not have to be answered in my lifetime.