The primary ethical problems with CRISPR in humans so far have come from “germ line” genetic engineering.
Scientists just took a big step toward making that once unthinkable prospect — biological males giving birth — a reality.
Biology is a lavish display of sophisticated designs exceeding all human engineering to date.
“We have already genetically engineered babies, the march toward three- (or more) parent human embryos, and radical proposals for creating novel family forms.”
This essay has argued that Lewis was prophetic as regards the advent of techniques powerful enough to bring about the effects he feared.