In almost every country in the world, average ages are rising fast, putting pressure on city councils, health-care systems, and national economies. And the solution may be the empowerment of older people themselves.
Seen as China's most powerful leader in decades, President Xi could secure his hold for years to come at the next Party Congress. In the South China Sea, a potential flashpoint, Beijing has already signaled its dominance.
On the campaign trail, President-elect Trump repeatedly challenged the status quo regarding key US allies, including NATO, Japan, and South Korea. But his actual intentions are unclear.