Amazon calculates a product’s star ratings based on a machine learned model instead of a raw data average. The model takes into account factors including the age of a rating, whether the ratings are from verified purchasers, and factors that establish reviewer trustworthiness.
This book engages all who want a sociology that is relevant to thye 21st century, a must read for anyone who is really concerned with understanding the structure and dynamics of complex social systems across the planet.
This book is only summary of Critical Mass. It is much shorter, BUT it includes less material. The ideas are the same, the examples are the same, the illustrations are (some) the same. Moreover, I bought the Kindle edition: illustrations are completely useless in the e-book: no colors, no viewable size. Critical Mass is a GREAT book, I bought this one expecting to get something else. My recommendation: don't waste your time and money with this book. Buy and read Critical Mass.