OK, so through the Tenth Amendment - (if it's not prohibited here, states can make laws). Do you see how that's a softer argument than saying that "the Constitution provided for slavery"?
That statement made earlier was pretty strong because it implied that you thought the Constitution had a provision allowing for slavery. Instead, you're just interpreting the Tenth Amendment to allow for slavery by default. I don't take much issue with that - just the way it was originally characterized
Anyways - I appreciate your response about Brown v Board. Although for all the hubub surrounding the 'liberal justices' 'legislating from the bench' I personally think that part gets overblown for reasons stated above.
Ever since Marbury v Madison, Courts have had the right to interpret the Constitution and that's not ever going to change. I think it's also important to remember that the Constitution isn't a huge all-encompassing document. I think if it's meant to govern effectively, it's principals have to be interpreted to mesh with modern times.
That's not to say that I support the Court interpreting intention to legislation that was never there in the first place, but I subscribe more to the 'living document' philosophy. All of that said - I've been surprised in how much I end up agreeing with certain Scalia opinions.
The only one of his opinions that involved fairly weak legal reasoning that I can think of off hand - is when he interpreted the recusal rules. It was something to the effect of 'the appearance of impropriety is not enough - only actual impropriety should cause a judge to recuse himself. Judges are impartial and are the only ones who can say if there is actual impropriety. I am not biased, therefore I am not recusing myself.'
The widely accepted and practicing standard is still the appearance of impropriety however