In an exchange with Mark Shriver, I was pointed to this 2007 position paper in Science, The Science and Business of Genetic Ancestry Testing. It’s an interesting historical artifact. Much of the critique was aimed at AncestrybyDNA, but it can be generalized. Now that 23andMe has ~100,000 customers, have the things which they worried about come to be? Perhaps one of the more curious aspects of all this is that individuals no longer need to rely exclusively on the commercial gatekeepers if they have their raw genotype.