Limits, Perspectives, and Thought

Imagine a universe without human beings. Now imagine a universe devoid of any creatures like human beings, beings who could think about the universe and in so doing consider it as divided up into different kinds of things that could be objects of understanding. Now imagine – this is harder – your not being there, or anyone else, to imagine such a universe. Next think about setting about describing in physical laws such a universe in line with a completist physicalist program: that all the facts about the world are physical facts. But where would one begin? Why would one begin? Remember there is no-one around to take more interest in any part of the universe than any other. This contrasts with what we do now. What we do now is take chunks of the universe – stars, planets, water, trees, air, particles – and demarcate the physical laws in such a way as to explain how these objects behave against a background of other objects and ultimately the universe as a whole. But what if we were not around? Why would we there be any reason to demarcate groups of physical laws in this or any other way? My suggestion is that there would be none. The grouping of the physical laws to form complex classes and layers of explanations (how trees and water are related; how planets move as part of a solar system) is parasitic upon creatures having particular interests giving them a perspective (‘perspective’ is being used here in a somewhat technical sense) upon the universe or world, which in turn derives from the kind of limited creatures they happen to be. But the perspective itself is not a physical fact about the universe. Rather it is a way of coming to form a system of facts about the universe. Further, not only might the perspective have been otherwise, there might be none at all. In which case the demarcation of physical laws, given meaning by their application to entities picked out as having a certain significance to us, would not get off the ground. At best there might be a random bunching of laws covering regions of the universe. But such random bunchings would have no meaning; they would be unintelligible; they wouldn't really be about anything. For laws to be about things you have to have limited creatures who differentiate between parts of the universe, and for whom different parts have a variable significance and value. Things stand out for them; they literally exist. Without such creatures, things we take for granted would, in the literal sense, not exist. It is the very limitedness of our perspective and capabilities, such that things are problems for us, and wherefore we literally or metaphorically bump into things, that brings objects into existence for us. Otherwise the universe would be utterly ‘flat’ and undifferentiated. A limitation of perspective is required for there to be objects of thought, and thus for thought itself. Thus, the intelligibility of the laws of physics is logically parasitic upon our having varying interests in different segments of the universe.