  The stellar initial mass function (IMF) is predicted to depend upon the
temperature of gas in star-forming molecular clouds. The introduction of an
additional parameter, $T_{IMF}$ , into photometric template fitting, suggest
most galaxies obey an IMF top-heavier than the Galactic IMF. The implications
of these revised fits on mass functions, quiescence and turnoff are discussed.
At all redshifts the highest mass galaxies become quiescent first with the
turnoff mass decreasing towards the present. The synchronous turnoff mass
across galaxies suggests quiescence is driven by universal mechanisms rather
than by stochastic or environmental processes.
