Philosophy of time: Combining the A-series and the B-series Hanne Kristin Berg Abstract: Concentrating on different theories of time, this thesis takes as a starting point the A-series and the B-series as presented by McTaggart (1908), and as used by philosophers of time during the last century. I will conclude that both of these series are, not only compatible, but necessary for the conception of time. A main part of this thesis will be used to show that theories that point to the incompatibility of the A- and B-series are flawed: I argue against the mutual exclusion of the A-series and the B-series.