 There is a contrary tendency amongst those philosophers who take modern physics seriously to be sceptical of entities like constantly shifting temporal properties of events, since such properties play no role in modern physical theory. One view, defended by Paul Horwich (1987, Chapter 2) and Huw Mellor (1981, 1998), is that even though McTaggart showed that the A-series is impossible, the B-series (that is, static classical spacetime structure) suffices for time.