The transition from the U.S.-led global order will be rocky

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Robert Muggah is a co-founder of the Igarapé Institute and the SecDev Group and a senior adviser to the United Nations. Misha Glenny is a British journalist and currently serves as rector of the Institute for Human Sciences. The rise in doomscrolling is a morbid sign of the times. The obsessive consumption of negative news isn’t just bad for physical and mental health, but our very survival. Recent studies confirm that overexposure to social media short-circuits the brain’s natural self-defences, leaving us disoriented and depressed. It turns out that optimism is good for us. People fortified by an optimist mindset...