when talking about rights of individuals, slavery is much, much worse than abortion IMO. a slave is aware of the injustice to him and living out the injustice, an aborted child wasn't ever aware of their injustice.
now, if talking about societal evil, then yes, abortion could be considered on par with slavery, but it certainly isn't relative to the individual involved.
Well, that's just wrong.
Somebody rips the limbs off a small child and crushes their skull and rib cage...are you saying that the fact that they're not aware of their position under the law somehow makes that less horrible?