 Most authors exploring the connection between the thermodynamic and causal asymmetries argue that the causal asymmetry is ultimately grounded in some facts about the initial state of the universe. Some authors, however, have argued that the explanatory direction is reversed and that the causal asymmetry accounts for the asymmetry between prevailing initial and final conditions. Maudlin has argued that the difference between initial and final conditions is a reflection of causal laws that, he maintains, underwrite the passage of time (Maudlin 2007: 131). 