The period
The embryo is fourteen days old. No nervous system, no heartbeat. A cluster of cells smaller than the period at the end of this sentence. And it is a human being.
That conviction is not a feeling. It is a conclusion drawn from a philosophical tradition that predates CRISPR by two millennia. Aquinas understood form and matter. The embryo is ensouled matter from conception. The DNA that CRISPR edits is the material language through which the form of a specific, unrepeatable person expresses itself. To edit the germline is to alter that language permanently — for every descendant across centuries of lives never conceived. The editor speaks. The descendants listen. They were never asked.
We celebrate Casgevy. Somatic therapy that cures a consenting patient is a moral triumph. The distinction is not arbitrary. Somatic modifies a body with permission. Germline modifies a lineage without it.
The effective accelerationists count children born with sickle cell. We count them too. We also count the children who will be born into a world where disease
has been expanded by market forces to include conditions that are not diseases, and the line between healing and enhancement has been erased by institutions that profit from the erasure. The bioethicists conceded the premise that editing is permissible under some conditions. Once permissibility is conceded, conditions become negotiable, and conditions negotiated by committees are revised by markets.
Where we concede ground: A child born with Tay-Sachs will die before five. Believing non-interference outweighs that is easier from health.
What would change our mind: A philosophical argument showing embryonic moral status is contingent without creating a principle that could deny status to newborns.
Read the full synthesis: Who gets to edit the human genome?