"Values are involved in the selection of the problems we study; values are also involved in certain of the key conceptions we use in our formulation of these problems, and values affect the course of their solution.  So far as conceptions are concerned, the aim ought to be to use as many 'value-neutral' terms as possible and to become aware of and to make explicit the value implications that remain.  So far as problems are concerned, the aim ought to be, again, to be clear about the values in terms of which they are selected, and then to avoid as best one can evaluative bias in their solution, no matter where that solution takes one and no matter what its moral or political implications may be"  (The Sociological Imagination, 1959, p. 78).