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From the book title I was expecting a more scientific analysis of a new form of intelligence. Specially the choice of the title suggest a continuation/improvement of the "Emotional Intelligence" concept. I was disappointed to find out that this book it is not.
This book studied the concept of the capabilities that humans have when they work together towards a goal. The concept it is not new as every big achievement in mankind has been done by collaboration (at least on the ideas level) of many people. However, the book names this collective work as Connectional Intelligence.
The study of this new terminology (and old practice) is done in this book by a collection of success stories where people, together, did things that it would seem impossible before. Most of the stories are in our own age which makes them much more interesting.
In general, I got disappointed as it was not what I let to believe from the title, but, this book is a collection of interesting stories which makes it an interesting read (just be patience in the beginning, or just skip the first chapter).
While I agree 100% with the author's viewpoint, I think he is trying to hard to make an easy argument. If you are unfamiliar with the concept of connectional intelligence (i.e. collaborative wisdom is better than individual wisdom) or are looking for some sort of inspiration, this book is a fun read. Otherwise, you'd be disappointed.