 What of the common requirement that revolutions be rapid, event-like, unlike the century-and-a half-long Scientific Revolution? Brad Wray (2011, 42f) answers that there is no reason that a revolution need be an abrupt event. What is important is how thoroughgoing the change is and that it be change at the community level rather than a Gestalt switch experienced by certain individuals. (After the original publication of Structure, Kuhn acknowledged his confusion in attributing Gestalt switches to the community as a whole as well as to individuals.) On Wray’s view, evolution and revolution are not necessarily opposed categories. And with this understanding, the Toulmin and Goodfield comment quoted above becomes compatible with revolutionary transformation, which, not surprisingly, takes time to become thoroughgoing. Meanwhile, the Butterfield quotation suggests that what counts as a striking change is a matter of historical scale. By our lights today, 150 years is a long time; but, against the long sweep of total human history, a change of the magnitude of the Scientific Revolution was quite rapid. Perhaps today’s rapid pace of scientific and technological innovation makes us impatient with slower-scaled developments in the past. And it is surely the case the some of the slow, large-scale transformations now underway are scarcely visible to us.