Dave Winer thinks that the web needs to be backed up and decentralized, to protect it from #SOPA and whatever comes after #SOPA. Perhaps the problem is deeper than that. The web is a collaborative story-telling enterprise, perhaps the grandest one ever, and collective narrative has a way of turning in history. In a way, every tweet or blog post attempts to commit history by creating a primary source. These sources need to survive somehow, and whenever a source is erase future history is edited. Some sources will be lost by inevitable technical failure; other will be lost by organizational or corporate action, by shutting down a blog host or by intellectural property claims. the only way around these threats is decentralized backup and redundancy.