Whether people want to play games and download music, engage in social networking and professional collaboration, or view pornography and incite terror, the Internet provides myriad opportunities for people who share common interests to find each other. The contributors to this book argue that these self-selected online groups are best understood as tribes, with many of the same ramifications, both positive and negative, that tribalism has in the non-cyber world.

In Electronic Tribes, the authors of sixteen competitively selected essays provide an up-to-the-minute look...