It’s in the air. History is cool, and the power of personal narrative puts oral histories front and center in a general appreciation for the past and efforts to preserve it. Though digital technologies have made preservation easier in many ways, the principles are old. Thomas Jefferson’s call to “save what remains not by vaults and locks which fence them from the public eye and use . . . but by such a multiplication of copies,”3 has remained the single most effective preservation tool, described here as the principle of redundancy.