Francis Beckwith interview: Abortion and human equality

No one — not even the most sophisticated advocate of abortion choice — denies that the unborn are human beings, but one can only exclude them from the community of those whose lives we must respect if one claims that they lack some morally significant characteristic that is possessed by mature and healthy human beings.

If this is true, as some abortion-choice advocates maintain, then some human beings are so intrinsically inferior to others that they not only lack moral status but they can be killed without justification. Consequently, according to this perspective, possessing a human nature in and of itself is not morally significant. This is why in Defending Life I call some abortion-choice supporters Anti-Equality Advocates (AEAs).

http://www.nationalreview.com/article/369092/abortion-and-human-equality-interview