The document discusses two perspectives on how online communities impact society. Howard Rheingold believes they can ultimately benefit society by facilitating interaction, while Neil Postman argues they will have a negative impact. The author tests these perspectives by interacting on Facebook and Second Life. For Second Life, the author finds that most users spend significant time online but do not expand their online relationships to real life. However, for Facebook, the author finds it can facilitate real-life social connections by helping people keep in touch over long distances. While both sites present some risks, the author concludes that technology itself is neutral—it is how people choose to use it that determines its social impact.