Yuval Noah Harari's third book 21 Lessons for the 21st Century is an interesting look at 21 topics where we humans can improve. The lessons are grouped into 5 categories; The Technology Challenge, The Political Challenge, Despair and Hope, Truth, and Resilience. The subject matter for the first part of the book is tough reading. Harari takes a cold and calculating look at the societal organisations and structures that humans have created, from religion all the way up to modern day terrorism, before looking at how the species can be resilient in the face of these challenges.