 Some analysts agree that casting the net more widely might shed comparative light on scientific change, and that Kuhn’s model is too restrictive even when applied only to the mature sciences. We have already met several alternative conceptions of transformative change in the sciences. Kuhn believed that innovation in the arts was often too divergent fully to express the essential tension. By contrast, the sciences, he claimed, do not seek innovation for its own sake, at least normal scientists do not.