Science policy is a systematic effort for promoting and directing the development of science. But is it possible to plan and control science at all? Is a rational science policy possible? Are attempts to guide the development of science harmful to the autonomy of science? While questions like these continue to be heatedly disputed, it is natural to inquire whether the recent discussion about models of scientific change within philosophy of science can throw any light upon them.¹ This chapter deals with some aspects of this problem by giving special attention to the "finalization thesis' of Böhme, van den Daele, and Krohn.