A TIMES BOOK OF THE YEAR 2021 Punchy funny and invigorating ... Pinker is the high priest of rationalism Sunday Times If youve ever considered taking drugs to make yourself smarter read Rationality instead. Its cheaper more entertaining and more effective Jonathan Haidt author of The Righteous Mind In the twentyfirst century humanity is reaching new heights of scientific understanding and at the same time appears to be losing its mind. How can a species that discovered vaccines for Covid19 in less than a year produce so much fake news quack cures and conspiracy theorizing In Rationality Pinker rejects the cynical clich that humans are simply an irrational species cavemen out of time fatally cursed with biases fallacies and illusions. After all we discovered the laws of nature lengthened and enriched our lives and set the benchmarks for rationality itself. Instead he explains we think in ways that suit the lowtech contexts in which we spend most of our lives but fail to take advantage of the powerful tools of reasoning we have built up over millennia logic critical thinking probability causal inference and decisionmaking under uncertainty. These tools are not a standard part of our educational curricula and have never been presented clearly and entertainingly in a single book until now. Rationality matters. It leads to better choices in our lives and in the public sphere and is the ultimate driver of social justice and moral progress. Brimming with insight and humour Rationality will enlighten inspire and empower. A terrific book muchneeded for our time Peter Singer