Remember the shock (or thrill) of realising for the first time that some people see you as a foreigner? Unless you thought that they were just wrong, what you discovered at that moment was that the local/foreigner distinction is 'perspectival'. How it is applied depends on where one stands; two different speakers may draw it differently, without either being mistaken; and there's no right way to apply it, from a perspective-free or 'god's-eye' point of view.
We humans have made many such discoveries, individually and collectively. Some of them were major intellectual achievements. Some of the lessons are still sinking in. Others, perhaps, have yet to come over the horizon. And we always learn something important, both about the world and about ourselves, when we uncover a new case.
I'm interested in the possibility that causation is perspectival in this way, and that the centrality of the notion of intervention is a key reason for thinking that it must be perspectival. In this talk I'll try to do three things: (i) clarify the general notion of what it is to be perspectival, in the relevant sense; (ii) sketch some arguments for thinking that causation is perspectival; (iii) discuss the kinds of things we learn about ourselves and about the world, in this case, if we accept that causation is perspectival.