All these viewpoints can be summarised by the results here obtained. Indeed, in relation to the link between the thermodynamic statistical analysis of the irreversible paths and their stochastic order , the energy flow, between systems and their environment, have been shown to select and shape the paths . As a consequence of this interaction, irreversibility occurs also at the atomic dimension. But, just this result allows us to approach the problem of causality, by starting from the analysis of the EPR paradox. In this way, time is the consequence of the causality, which is the result of a sequence of ordered events, but also of irreversibility; indeed, the continuous interactions, between the atomic electrons and the electromagnetic waves in the environment, causes the non-equilibrium state of our Universe .