Despite 300-something pages, the book feels compact and leaves me wanting for more. Any of these chapters could be a fantastic standalone book, and any of them raises a lot of important questions — although not necessarily ‘Lessons’ as the title suggests. Nobody has these lessons, and while Harari sometimes over-simplifies or dramatises, he acts as an important messenger, to show some of the possible outcomes if we are careless. ’21 Lessons for the 21st Century’ recycles lot of Harari’s earlier books ‘Sapiens’ and ‘Homo Deus’, but builds on it and refines it through intelligence, intuition and empathy. The book is a journey that becomes increasingly personal to Harari’s life. And just as you think the plot is lost, the trip is brought back in full circle.