"You think the death penalty is a good idea? Persuade your fellow citizens to adopt it. You want a right to abortion? Persuade your fellow citizens and enact it.
Of course, Bainbridge bows down before Scalia's feet like every other time he posts.
Let's backtrack a little and suggest the following course of action: "You think slavery is a bad idea? Persuade your fellow citizens to outlaw it."
Guess what idealists? Your assumptions are broke.