Bill Gates now expresses optimism about humanity's survival.
Key question should not be how much temperatures rise but how effectively humans adapt, protect vulnerable communities and reduce long-term risks.
Gates maintains that there is still a significant threat to the world's poorest populations, who have less capacity to adapt.
Despite his optimism, Gates has faced scrutiny over his lifestyle.
'Won't lead to humanity's...'
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In the world of social enterprises, failure is a cringe-worthy moment nobody wants to talk about. But, social entrepreneurs can benefit from their failures.