Future colliders for the high-energy frontier

Colliders have been at the forefront of discovery in particle physics for more than half a century. Building on the success of the Large Hadron Collider (LHC), the field of particle physics has been developing and reviewing the scientific cases for the colliders to succeed the LHC in the context of regional and international review and long-term planning processes. The aim is to reach consensus about which new collider or even colliders to build. This collider would determine the future direction of the field of particle physics and, ideally, lead to solutions to unanswered questions and problems with the Standard Model. We will provide a short overview of the current proposals for different colliders for the high-energy frontier and their proposed run plans. It will focus on comparing and contrasting their physics potential, while also placing them in their historical context.