Hmmm, seems at one time slavery was legal...and blacks weren't human beings, they were "property".  Hopefully, we'll get away from the wholesale murder of unborn children, just as we got away from keeping other human beings as "property."  Both are dehumanizing.  (And it's only "legal" because in another great SCOTUS decision based on fantasy...somewhere in their drug addled brains a majority of the justices "found" a "penumbra" in the Constitution that allowed it.)  The Constitution, which enumerates the powers given to the federal government was silent on a woman's right to commit infanticide of her child.  I refer you to Amendment 10.  To pass laws allowing or disallowing the murder of one's children before they're born is a state matter.  At least, to this point, it's still illegal to murder them AFTER they're born!