A high-energy high-luminosity polarized Electron Ion Collider (EIC) was enthusiastically recommended
by the US nuclear science advisory committee (NSAC), as the highest priority new facility
to be built in the US, in its long range planning exercise conducted in 2015. Understanding the role
played by the gluons in binding quarks and gluons in nucleons and nuclei — most of the visible
universe — is the central goal of the EIC. We will summarize the science case for the EIC and
discuss the status of the project on the path to realization.