Assuming we can hold our alliance system together, we've got a good 15 years before anyone can think about direct military confrontation with the US. As long as

Assuming we can hold our alliance system together, we've got a good 15 years before anyone can think about direct military confrontation with the US. As long as 30. Of course, that assumes China's trajectory remains the same and doesn't change. If China fails in some way, then the US remains sole hegemon for the foreseeable future.