The only ethical question about abortion becomes: At what point can a fetus feel pain? Doctor-assisted suicide becomes an obviously good thing: People who are suffering should be allowed to end their lives, and should be given medical help to do it painlessly. Same for stem cell research: Why not take tissue from all those embryos living in suspended animation in fertility clinics? They can’t feel pain, but their tissues could help researchers develop cures that would spare sentient people from pain.
