The dominance of quenching through cosmic times
  The evolution with cosmic time of the star formation rate density (SFRD) and
of the "Main Sequence" star formation rate-stellar mass relations are two well
established observational facts. In this paper the implications of these two
relations combined are analytically explored, showing that quenching of star
formation must start already at very early cosmic times and the quenched
fraction then dominates ever since over the star forming one. Thus, a simple
picture of the cosmic evolution of the global SFRD is derived, in terms of the
interplay between star formation and its quenching.
