Why Not Raise A Little Hell?

this class was later removed from the curriculum

I think the most Slytheriny Slytherin there ever was was Slughorn. He was so freaking ambitious, but he wasn’t a particularly great wizard himself. So he cultivated a little following of great wizards to do all the work for him. He was never evil or mean or cruel like a dark wizard though. He got all this sway in powerful places because he was nice to, encouraged, and manipulated powerful wizards when they were young. And then he literally never had to do anything for the rest of his life. All these great wizards just gave him free stuff and listened to his opinions on politics and business because he had been their mentor. If anyone was being a Slytherin the right way, it was this guy.