A Pessimist: The world is so fucked up: unsavable, will go into extinction with Climate Change.
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An Optimist: It’s not too late if everybody gets their acts together. Just look at advance in medical science and how millions of people have come out of poverty in the last few decades.
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Pessimist versus Optimist: who is winning the worldly perception on the future of the world or that matter, their own individual life outlook?
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This varies country by country. The Koreans as do the Japanese are the pessimist lots compared to the Indians and Chinese. A recent Pew Research survey found 63 per cent of the Americans are pessimistic about their country’s moral and ethical standards.
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Paradoxically, pessimism can drive nationalities like the Koreas and Japanese to work harder, do better and solve whatever problems they have. It can motivate people, in other words, to act.
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But critics say in terms of Climate Change, “pessimism is a hinderance rather than a support to the case for existential risk mitigation,” according to 2023 paper in the journal Philosophy and Public Affairs.
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Noone is profound in the belief in the balance of optimism and pessimism than Bill Gates as he drove Microsoft from almost bankruptcy to the world’s most valuable company. He acknowledged setbacks while maintaining optimism for eventual progress.
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On the pessimist side, just look at Charlie Brown with his worldwide popularity!
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Back to the world view on outlook of Climate Change, Vanderbilt University’s Assistant Professor of Philosophy David Thorstad argues, based on a series of mathematical models, that becoming more pessimistic about this makes us significantly less enthusiastic about reducing it. 
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Whereas, become more optimistic about tackling Climate Change makes us significantly more enthusiastic about doing so.
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There appear more pessimists than optimists on the outlook of world existence. Which half of the glass are you?