  Electron Ion Collider (EIC) is a particle accelerator facility planned for
construction at Brookhaven National Laboratory on Long Island, New York by the
United States Department of Energy. EIC will provide capabilities of colliding
beams of polarized electrons with polarized beams of proton and light ions. EIC
will be one of the largest and most sophisticated new accelerator facilities
worldwide, and the only new large-scale accelerator facility planned for
construction in the United States in the next few decades. The versatility,
resolving power and intensity of EIC will present many new opportunities to
address some of the crucial and fundamental open scientific questions in
particle physics. This document provides an overview of the science case of EIC
from the perspective of the high energy physics community.
