I guess what this all boils down to is whether rights are inherently part of being human - whether humans are "endowed by their Creator with certain unalienable Rights" - or whether rights are simply a concept that can be given, or taken away by society at will, and don't truly exist except when we all agree that they do.
Personally, I think this argument is repulsive, and I hope your philosophy teacher is merely trying to start a discussion on the inherency of rights. If he's serious, then you should quit his class, and he really isn't worth listening to. You're better off sitting under a tree, reading some Plato and Kant, and thinking for yourself than listening to that drivel.
Actually it makes for some interesting debate in the class, and maybe thats what he is after, but I'm sure his position is that, yes, it is not 'wrong' to kill babies like it is to kill say you or me, but since people like you or we value babies, we shouldn't kill them, not for the babies sake, but for our sake.
This is fully in support of abortion at any and all stages, and so the argument goes, if you support such abortion, there is no reason that you should think infanticide is wrong, and again hes not trying to make us not support abortion, teach agrees with bill3000 here, and for the sake of debate, for those who dont, what are your reasons against?
(no hypothetical 'killing babies will undermine the species, or to some its right to some its wrong, what do you think and why?)
...to get my moneys worth i come here to get extra knowledge from you scholars you all....
If he says it is not morally wrong to kill babies, then it must be permissible. See my post above, and then try to tell me where I'm getting this wrong.
He says its not morally wrong, but not permissible because rational people who do have moral rights value babies and so killing a baby would affect these people who care about that baby that is killable.
Like art, its not 'wrong' to shred the mona lisa, but people value it or care about it so we should not shred it, but shredding it does make ruining a painting a 'moral' matter of wrongness.