One of the most informative and insightful compendiums about the evolutionary history of our brains and central nervous systems, that reveals each of the key increments in our cognitive evolution. This book breaks down the almost impossible task of understanding our complex brain structures by bringing in the temporal dimension of evolution with its incremental additions using brilliantly chosen first-approximations that identify 5 key breakthroughs that led to our very unique human cognitive capabilities. This book is a must-read for anyone interested in understanding how our brains work and how we got here. One point I learned is that you cannot understand one without the other.