I believe that the data is both fascinating and instructive, but in this paper I will resist the conclusion that we must give up Invariantism, or, as I prefer to call it, Unificationism. In the process of examining the challenging data and responding to it, I will try to draw some larger lessons about how to use the kind of data being collected. First, I will provide a brief description of some influential theories of responsibility, and then explain the threat (...) to them from the experimental results. Finally, I will set out my general approach to the data, as well as some specific suggestions about how to think about each set of experiments. I will conclude that philosophers searching for a unified theory need not give up, but that at the same time they can learn a great deal from the new data. (shrink)