2020 Volume 25 Pages 35-56
Liberal eugenics insists on the modification (editing) of the human embryo's genome for the well-being of future unborn children. The criteria for this modification have multiple steps, but the ultimate criterion is the most superior genetic sequence. This paper reveals the paradox of liberal eugenics by pointing out that this single criterion rather jeopardizes the sustainable survival of humanity. As long as the best genetic sequences converge into a single order, liberal eugenics will lead to a reduction or loss of genetic diversity, which is essential for the sustainability of species. Liberal eugenics, insofar as it pursues the best genetic sequence (objective value), will produce the opposite of its original ideals. Because of this paradox, we conclude that there should be clear limiting criteria for genome editing techniques in human embryos.