why go through all the trouble to get what you already have
Eh, sorta. No doubt that slavery was legal, but Dred Scott didn't esablish it. It wasn't a question of legality, it was a question of re-enslaving a slave who had lived in a free state. It was a tacit agreement from SCOTUS on slavery, but not a direct endorsement.
The problem was and wasn't slavery. It should be differentiated into necessary and sufficient causes. The necessary cause was that whole generation being a bunch of bungling morons with too much free time. The sufficient cause was slavery. No doubt that slavery was a horrible thing, and it was the catalyst for everything, but when you have members of congress smacking the hell out of each other with sticks, you don't really need a specific, identified cause. They'll find one on their own.
I rather enjoy the idea of Congressmen smacking each other with sticks.
Yes. Perhaps Brooks was the only politician in history with any sense at all. Well, I suppose Hamilton and Burr had some, too. Ken Burns's series mentioned that representatives started carrying pistols and knives onto the floor after that happened. Brooks's supporters started sending him canes after that incident, so maybe we should start some kind of "clubs for reps" program. Let 'em duke it out like men on the steps of the capitol. It's a huge stairway, so you could probably have ten or fifteen fistfights at a time, and the reflecting pool would make a good place for the headlining duel of the day. You'd get a very satisfying splash when one of them gets knocked down.