We have many contentious issues (e.g., abortion and gay marriage) for which there is no consensus. Why must they all be decided at the Federal level? Why not let States decide for themselves? Please leave out the moral arguments on both sides; there are just as many people who come to opposite conclusions. Also, the 13th and 14th Amendments specifically dealt with the end of slavery and the civil war, so don't bother with applying them to current issues.
I just want to know why you think the States shouldn't be allowed to decide these issues on their own.
I just want to know why you think the States shouldn't be allowed to decide these issues on their own.