 If we can say, well, bad things are stronger than good things in A, B, C, and D, but the exceptions are E, F, and G, the problem is we couldn't find exceptions. All different methods and all different sorts of phenomena keep pointing to the same conclusion. The mind just overreacts to bad relative to good. Baumeister and Tierney, in their new book, try to trace the power of bad to its evolutionary roots.