NEOLIBERALISM
As long as you're still paying their dad's rent, Neoliberalism is happy. Just don't ask if dad's paying income tax on the rent. And don't go in their room, some weird libertarian shit's going down. "Free markets am I right?", No Kevin that's a torture chatroom, please delete Tor. Even when Fascism is yelling slurs at Ecologism, Anarchism starts making Molotov cocktails in the kitchen, and Primitivism's orgy enters the lounge, Neoliberalism's headphones are too loud. Or they're doing coke on a yacht.
Weakness: once Anarchism forgive Marxism for Lenin having shot them all, the Nihilist starts not caring so much that they care about not caring, and Ecologism, Primitivism, and Distributism put the bong down, everyone agrees to move out because Neoliberalism's dad raises rent too much.