Are the ideals of the Enlightenment – reason, science and humanism – and the progress they can deliver being undermined by a cynical desire to burn it all down? Pre-eminent psychologist Steven Pinker explains why problems are inevitable and not a reason to destroy the institutions of modernity, with all the resulting chaos and carnage. The use of knowledge to enhance human flourishing will never bring about utopia, but it has given greater life, freedom, equality, safety, peace, and enrichment to billions, and promises still more if we rededicate ourselves to that ideal.  Steven Pinker is an experimental psychologist who conducts research in visual cognition, psycholinguistics, and social relations. Currently Johnstone Professor of Psychology at Harvard, he has also taught at Stanford and MIT. He has won numerous prizes for his research, his teaching, and his nine books, including The Language Instinct, How the Mind Works, The Blank Slate, The Better Angels of Our Nature, and The Sense of Style.