In an analysis of contemporary culture, Jonathan Haidt and Greg Lukianoff demonstrate how contradictions to ancient wisdom and modern research have prevailed in recent years and have produced dire consequences such as an increase in violence and cognitive distortions. These contradictions they call the three Great Untruths: ‘What doesn’t kill you makes you stronger’, ‘Always trust your feelings’, ‘Life is a battle between good people and evil people’.

All in all, the book offers great psychological insights into our psyche. It encourages us to regularly take stock of our multiple selves and deeper, hidden, sometimes ugly, parts of ourselves. A dialogue with our Shadow can drive us to live an integrated, wholesome life. Adopted on a global scale, Shadow work will inevitably, in my opinion, lead to a better humanity, a better society, a better world.

All in all, despite minor limitations, the Matthew Walker’s Why We Sleep is one of those rare books that contains the sine qua non of good writing – it changes the way you view the world.