  Our understanding of the cosmic evolution of supermassive black holes (SMBHs)
has been revolutionized by the advent of large multiwavelength extragalactic
surveys, which have enabled detailed statistical studies of the host galaxies
and large-scale structures of active galactic nuclei (AGN). We give an overview
of some recent results on SMBH evolution, including the connection between AGN
activity and star formation in galaxies, the role of galaxy mergers in fueling
AGN activity, the nature of luminous obscured AGN, and the connection between
AGN and their host dark matter halos. We conclude by looking to the future of
large-scale extragalactic X-ray and spectroscopic surveys.
