In this context it also makes sense to emphasize that we should pay just as much attention to problems defined by theorists as to those defined by practitioners. (See Evered and Louis, 1981, for a related discussion of insider-outsider perspectives.) While theorists may attack tractable rather than "relevant" problems, the outcomes they generate remain available as solutions to practitioner problems not yet identified. If theorizing resembles artificial selection, then theorists control both environmental selection and the criteria for survival of conjectures. This means that even though they may choose to study issues about which powerful people feel strongly, they need not. The thrust of Campbell's remarks is that they'll be better theorists if they don't.