What an information packed journey through human history - pity history was not taught like this at schools and universities. Harari glides the reader easily through understanding our homo sapien species evolutionary history, the periods of how we lived and why (such as the hunter gatherer, the agriculturist, the scientist) and the relative benefits or otherwise to mankind of our development ( which often have not led to greater happiness or less cruelty). Given that we are just extensions of the animal kingdom we are subject to the control of many factors outside of our control - so not so great after all. In fact in the not so distant future we are likely to be another species. A masterful read.