Abstract

Einsteins relativity of simultaneity had a deep impact on the pilosophy of time. A first conclusion is that there is no such thing as absolute time. Furthermore according to relativity of simultaneity there is no present in which an open future could come into existence and then pass into a fixed past. According to relativity of simultaneity there is no becoming in a three-dimensional space. There are just changes in a four-dimensional world, often called "block universe". Although many authors refuse this static interpretation of space-time, there is little doubt in the relativity of simultaneity. This is astonishing, because in the present cosmological models the relativity of simultaneity is not valid and the work of Hawking and Ellis has shown that there is good reason to refuse this principle.