I stumbled upon this book in my research for "prepping" and "survival" information which I have been actively pursuing over the last year. I read most of the reviews both positive and negative and decided it was worth the money, because even the negative reviews didn't say the information was useless, only that the reviewer didn't agree with the conclusions/or philosophy of the author. After finishing the book, I can honestly say it WAS worth the money. The book completely challenged the most basic assumptions and beliefs about life and sustaining life in the future. This understanding is the primary piece of the "survival/prepping" paradigm puzzle that I was missing and had given me so much trouble. Trying to balance living in a modern world, preparing for the worst, and then guessing how long the disruptions would last ultimately increased my stress levels, lack of confidence, and led me to institute many incorrect "survival" systems that are actually unnecessary if your fundamental understanding of the world and your place in it is congruent with the actual reality present. Not only does this book challenge the reader, but it almost seemed as if the author was sitting right next to me answering the questions that popped into my head during that given section. Obviously, the author has spent numerous quality hours researching and structuring the material in a way to try to anticipate any questions the reader has while balancing the presentation of the information as to not scare off or offend any not so open-mined persons or individuals that have never been presented a philosophy in this way. This book is for every human being alive on this earth, whether you end up agreeing completely with this author's conclusions or not. No matter what, it will expand your thought process and require you to at least defend your personal philosophy against a plethora of information presented. Enjoy.