evidence: Although the world seems destined to grow more competitive, congested, and contested in the coming years, the logic of major power cooperation remains inescapable. Any effort to shape a new international order that is stable, inclusive, and beneficial to all must be a collaborative undertaking. [...] Just such a situation appears to exist today. The international order largely constructed by the United States in the aftermath of World War II is still very much in evidence, but, at the same time, the global distribution of power is inexorably shifting with the rise of new powers as well as influential nonstate actors. The United States is also growing more reluctant to bear the costs of world leadership, especially when it comes to using military force. China and Russia, along with lesser regional powers, have taken advantage of this reticence in recent years to assert their own interests and to undermine the United States’ international standing and authority. [...] While each of these scholars views the world today and the challenges that lay ahead in different ways, they share a common belief that the opportunity to shape a new international order that is stable, inclusive, and beneficial to all still exists, though the window to do this is growing smaller. The experience of earlier transitional periods suggests that any effort to reform or create a new global order must be a collaborative undertaking. Although the world seems destined to grow more competitive, congested, and contested in the coming years, the logic of major power cooperation is inescapable.