Let me give a concrete example. There are people who believe machines will automate all work and humans will simply receive basic income and enjoy a life of leisure. And there are people who think machines will instead maximize their own power, and therefore we need a world coalition with monitoring systems to avoid extinction risk. These two camps end up fighting each other. But if they find their uncommon ground — which might be: there must be a world government with strong supervisory capabilities — that's actually the hidden shared assumption underlying their conflict.