Modi may rule till 2029! How long will other powerful world leaders last?

Modi, 67, is by far the most popular Indian politician; the opposition Congress Party is weak and lacks a charismatic leader

The international pecking order is usually defined by economic and military might. That puts the U.S. at the top of the pile, with China gaining fast in second place.

But when it comes to tackling long-term global challenges such as climate change, poverty or peacemaking, it’s also vital to identify which leaders are likely to stick around.

Whether democrats, dictators or somewhere in between, they’re all balanced atop a shifting ziggurat of potential rivals. And only those with the home front under control are in a position to make meaningful promises for the 2020s or beyond. That’s why France’s Emmanuel Macron