21 Lessons For The 21st Century By Yuval Noah Harari In the book, " 21 Lessons for the 21st Century , Yuval Noah Harari raises challenging questions about concepts that have become so enshrined in global society and the author shows how these concepts have failed us, particularly now that we need them the most. This book rattles the foundation of everything we have believed over the years and how they are now the very things that have stopped us from coming together to fight and win the battle of the future. This book does not merely scratch the surface, instead it goes in-depth to explain different ideologies and how we have always thought they were the answers to the world's problems. The book also gives readers something to think about after they have finished it. Part one presents the present global problems and the ones that will occur in the near future. The second part presents and examines the concepts we have embraced that seem like answers. The third part deals with war and terrorism in our present realities. The fourth part attempts to debunk all the fables we have heard so many times that they have become our current truths. Part five ties them all together and takes a general view at how we can find ourselves and make effort to save ourselves.