Future cosmic surveys of large scale structure and the cosmic
microwave background radiation will attempt to answer questions of
fundamental physics: what is the nature of dark energy? is cosmic
gravity completely described by general relativity? can we probe
the inflationary epoch through primordial gravitational waves?
what are the masses and hierarchy of neutrinos and are there
additional relativistic degrees of freedom? We describe the Cosmic
Visions process in the US, for what might come beyond the
DESI-Euclid-LSST-WFIRST era for dark energy and the CMB.
