 It is sometimes said that if society allows voluntary euthanasia to be legalized, we will then have set foot on a slippery slope that will lead us eventually to support other forms of euthanasia, including, in particular, non-voluntary euthanasia. Whereas it was once the common refrain that that was precisely what happened in Hitler’s Germany, in recent decades the tendency has been to claim that experience with legalized euthanasia in The Netherlands and Belgium, in particular, has confirmed the reality of the slippery slope.