Abstract

The philosophy of time contains a debate that the philosophy of space lacks, namely whether one time, the present, is objectively (i.e. mind-independently) unlike all the others. Whether reality itself is tensed, i.e. whether position in time has ontological significance, is a long-standing but still pressing question. This book defends a unified account of the structure of time and our representations of it, arguing that while the universe itself is not centred on any particular time, we can nevertheless explain why we so commonly think and act as if it is. In other words, a version of the B-theory of time is defended. It is argued, first, that eternalism—the view that all times are equally real—is the proper ontology of time. Then a semantics of tensed language and belief is presented that is entirely tenseless, hence compatible with eternalism. Next, it is argued that temporal predicates express relations between ordinary, three-dimensional objects, and times; accordingly, there is no need to posit the existence of temporal parts. Finally, it is argued that the B-theory provides an adequate account of change, persistence, and temporal passage.