  Observing massive galaxies at various redshifts is one of the most
straightforward and direct approaches towards understanding galaxy formation.
There is now largely a consensus that the massive galaxy (M_* > 10^11 M_0)
population is fully formed by z~1, based on mass and luminosity functions.
However, we argue that the latest data can only rule out number and mass
density evolution of a factor of > 2-3 at z < 1.5. We furthermore show that the
star formation history of M_* > 10^11 M_0 galaxies reveals that 40+/-5% of
galaxies with M_* > 10^11 M_0 at z~1 are undergoing star formation that
effectively doubles their stellar mass between z = 0.4 - 1.4. These massive
galaxies also undergo 0.9^+0.7_-0.5 major mergers during this same time period.
