While this book aims to provide a comprehensive picture of social networks, it also seeks toexplore how they influence our lives and our lives are influenced by them. The theory suggestingthat each person can be connected to every other person in the world through six interpersonallinks is worth to be considered because many cases supporting it are included in the book.The book makes us rethink of our understanding of the notion of the individual and has arevolutionary paradigm, offering the idea that social networks influence our ideas, emotions,behavior, politics and even our health.