 This broadly Kuhnian position position on the number and magnitude of revolutions contrasts sharply with Butterfield’s, who saw revolutions only as founding revolutions, and also with that of those epistemological realists who grant that revolutionary conceptual and practical changes have occurred but who believe that they will become successively smaller in the future as science approaches the true theory. Kuhn’s own later position, in which specialties are insulated from one another by taxonomic incommensurability, presents us with a somewhat less integrated conception of science and thus one less subject to large-scale revolutionary disruption. Since we can regard scientific practices and organization as highly designed technological systems, the work of Charles Perrow and others on technological risk is relevant here. (See Perrow 1984 for entry into this approach.)