Overland trade was disrupted, maybe both because of climate reasons, but also because it became unsafe to go from point to point. And then i think things like rebellions or, i mean, you could think of 30 years war ad a kind of rebellion as well. So rebel is ell across, that forces everybody kind of to turn inward. And when you turn inward again, your connections fray. You're no longer trying to build the world empire, or any kind of world order. I mean, i think there are lessons in that for our time so the order phrase, and this is what's lost in the seventeenth century crisis,.