The Physics with an Electron-Ion Collider from a Worldwide Perspective

The science case for a U.S.-based Electron-Ion Collider (EIC) has been developed by the QCD community over two decades. Most recently, it is summarized in the 2015 White Paper Electron-Ion Collider: The Next QCD Frontier and has been favorably reviewed in 2018 by a committee appointed by the U.S. National Academy of Sciences. The author presents a personal perspective based on these two reports.