https://aeon.co/essays/in-these-dark-times-the-virtue-we-need-is-hopeful-pessimism
In the early Enlightenment, of course, there were no such concerns for the future of the planet. But there were evils in existence – plenty of them. Crimes, misfortunes, death, disease, earthquakes and the sheer vicissitudes of life. Considering such evils, these philosophers asked, can existence still be justified?
This longstanding philosophical debate is where we get the terms ‘optimism’ and ‘pessimism’, which are so much used, and perhaps overused, in our modern culture. ‘Optimism’ was the phrase coined by the Jesuits for philosophers such as Leibniz, with his notion that we live in ‘the best of all possible worlds’ (for surely, if God could have created a better one, he would have done so). ‘Pessimism’ followed not long afterwards to denote philosophers such as Voltaire, whose novel Candide (1759) ridiculed Leibnizian optimism by contrasting it with the many evils in the world. ‘If this is the best of all possible worlds,’ Voltaire’s hero asks, ‘what on earth are the others like?’
But really, Voltaire wasn’t much of a pessimist: other philosophers such as Bayle and Hume went much further in their demonstrations of the badness of existence. For Bayle, and for Hume after him, the point is not just that the evils of life outnumber the goods (though they believe this is also the case), but that they outweigh them
