The Special Theory of Relativity, we teach our students, did away with
Absolute Space and Absolute Time, leaving us with no absolute motion or
rest, and also no absolute time order. General Relativity is viewed as
extending the "relativity of motion" applicable to curved spacetimes, and
General Relativity's most probable models of our actual spacetimes (the
big-bang models) appear to re-introduce a privileged "cosmic" time order,
and a definite sense of absolute rest. In particular, some of the same
kinds of effects whose *absence* led to rejection of Newtonian absolute
space are present in these models of GTR.