The idea of a unified reputation currency is starting to take hold online. It’s a notion many first became familiar with when Cory Doctorow wrote his science fiction short Down and Out in the Magic Kingdom, where the reputational equivalent of a dollar was called a “whuffie.” Now it seems to many that it could be closer to nonfiction. With broad agreement that reputation is a form of value, and various mechanisms already existing to score people and institutions on it, convergence on one metric seems achievable—even inevitable.