  Fundamental interactions are either fully or nearly symmetric under time
reversal. But macroscopic phenomena have a definite arrow of time. Though there
is no convergence on the origin of time's preferential direction, many
researchers believe that the direction of time is towards increasing entropy.
In this paper, we provide an alternate point of view. In driven-dissipative
nonequilibrium systems forced at large scale, the energy flows from large
scales to dissipative scales. This generic and multiscale process breaks time
reversal symmetry and principle of detailed balance, thus can yield an arrow of
time. In this paper we propose that conversion of large-scale coherence to
small-scales incoherence could be treated as a dissipation mechanism for
generic physical systems. We illustrate the above processes using turbulence as
an example. We argue that the above picture of time irreversibility could be
employed to the universe and to many-body quantum systems.
