Possibly the guiding principle of modernity is that any problem can be solved if people just put their minds to it. Science and liberalism have been astonishing successes in raising the standard of living, in an objective sense, for more people than at any other time in history. People like Steven Pinker love to wax optimistic about how Enlightenment values and scientific progress have made the world an objectively better place to live than ever before, with the implication that things will only get better. But is this really true?
