  Muon colliders provide a unique route to deliver high energy collisions that
enable discovery searches and precision measurements to extend our
understanding of the fundamental laws of physics. The muon collider design aims
to deliver physics reach at the highest energies with costs, power consumption
and on a time scale that may prove favorable relative to other proposed
facilities. In this context, a new international collaboration has formed to
further extend the design concepts and performance studies of such a machine.
This effort is focused on delivering the elements of a $\sim$10 TeV center of
mass (CM) energy design to explore the physics energy frontier. The path to
such a machine may pass through lower energy options. Currently a 3 TeV CM
stage is considered. Other energy stages could also be explored, e.g. an
s-channel Higgs Factory operating at 125 GeV CM. We describe the status of the
R&D and design effort towards such a machine and lay out a plan to bring these
concepts to maturity as a tool for the high energy physics community.
