Many researchers - and their advisors on research method - adopt a doctrine called empiricism, which claims that researchers may only use empirical methods. This restrictive doctrine impoverishes any academic discipline where it is dominant. The main reason is that a discipline only qualifies for the status of a science after it has progressed beyond empirical generalisations to explanatory theories; but although empirical methods are useful for discovering the former, they are inherently useless for creating the latter. So the empiricist doctrine retards scientific progress. Researchers should be aware of this danger, and research methodologists should attempt to counter it.