Technology is weaving humans into electronic webs that resemble big brains — corporations, online hobby groups, far-flung N.G.O.s, suggests author Robert Wright. “And I personally don’t think it’s outlandish to talk about us being, increasingly, neurons in a giant superorganism; certainly an observer from outer space, watching the emergence of the Internet, could be excused for looking at us that way…. If we don’t use technology to weave people together and turn our species into a fairly unified body, chaos will probably engulf the world — because technology offers so much destructive power that a sharply divided human species can’t flourish.”