The loss of the Intermediate-Range Nuclear Forces Treaty may be only the beginning.
Protests in Hong Kong and Russia show the limits of what many see in the West as autocratic power.
Encounters involving hostile states needling U.S. allies while avoiding confrontation with U.S. forces are becoming more widespread.
Nations are heading back to the moon because they wish to ultimately stay there.
As the current U.S.-Turkey row shows all too clearly, mixing and matching the latest Russian and U.S. weapons systems is something Washington does not take lightly.
If China genuinely wishes to dominate its region it will need to make rather fewer missteps.
Whether the United States and its allies would go to the same length to support an ally today remains a very open question.
Cross-border investment and globalization is no longer seen as one of the major guarantors of international peace.
While the figure at the top might change, the military-dominated power structures beneath may prove much harder to shift from power.
Beijing is becoming much more assertive right up to territory held by other nations, both with military force and "civilian" vessels.