This video looks at the issue from the perspective of Russia's choices, concluding with the advice that, given Russia's relationship with China will surely not last, Russia should leave itself a way to partner with the US in future.
But from our perspective, while agreeing with the predictions of the video, the US should be getting ready replace Russia as China's partner, thereby leaving Russia without a partner outside of Turandom. I have actually been thinking about the content of the potential partnership that the US could have with China. Many China analysts agree that, even after China takes over from the US as the new world leader, it is extremely unlikely to involve itself in military conflicts outside of its own region, which could create a dangerous power vaccuum. Therefore I envision that the US could simply continue in this role of military interventionism that it has already defined for itself despite economic decline, so long as China can be convinced to adopt the view that such a role must be filled by someone (hence so long as China itself does not want this role, it should endorse (to the extent of providing economic support for) the US keeping it). In order for this to happen, the US must by then have become a fully ideologically American (ie. de-Westernized) country whose military targets will be primarily Turandom countries.