 The first structure of “positions in time,” McTaggart called the B-series. I will assume that McTaggart intended the B-series to coincide with the Newtonian spacetime structure described above. McTaggart noted that there was something static or “permanent” about the B-series. If, for example, event \(e_1\) is earlier than event \(e_2\) at some time or other, then one may truly assert at all times that \(e_1\) is earlier than \(e_2\) .