First off, apologies if some of the themes and arguments of this post have become repetitive. I find that in trying to arrive at a synthesis, it is useful to go over and over the points, making sure to try and modify a bit each time through. Ordinarily this process takes place in private, usually in notebooks, but part of the idea of this blog is to open the process to public scrutiny for whatever benefits it might produce. Readers can tune in or out as they see fit.
The natural philosophy problem appears to have remained a topic of serious historiographical conversation through the course of the 1980s. One big problem is that natural philosophy is a vague term: it applied to aspects of Peripatetic philosophy, but in the twentieth century Harvard physicist Percy Bridgman (1882-1961) still held a chair in mathematics and natural philosophy and was in fact a well-known writer in the philosophy of science. Some natural philosophy chairs even still exist today (Bertrand Halperin now holds Bridgman’s old chair, and they apparently still officially spell “mathematicks” with a “k”!).
Obviously, all these “natural philosophers” are doing rather different things, so historians would be ill-advised to try and look for a single definition of natural philosophy, even within delimited time periods, or to try and locate a “real” natural philosophy. One promising tactic is to apply ahistorical analytical criteria to different aspects of natural philosophical work, while allowing that natural philosophers might not have perceived the distinctions between these “aspects”.
As we have seen for the eighteenth-century heyday of natural philosophy, Simon Schaffer was keen to analyze natural philosophy in terms of a fully fleshed-out “cosmology” of ideas. Analyzing these universalizing aspects of natural philosophy makes a lot of sense: in many venues natural philosophers (being philosophers) would have been expected to draw upon their general store of learning to discourse on topics ranging from astronomy to epistemology to ethics, and to articulate the connections between these subjects. Through the 1980s, Schaffer argued (especially early on) for embracing the sincerity and importance of the particular questions posed within systems of thought, rather than seeing the cosmology or system as simply some extension of an underlying fundamental commitment or accommodation to a partisan religious, political, or intellectual program, such as atheism, royalism, or “Newtonianism”. Looking at systems of arguments in this way, one could query the underlying intellectual assumptions that governed what made particular features of these systems into coherent arguments, and thus better understand why they were formulated and argued in the particular ways that they were. As in his discussions of early Kant or William Herschel, one could also query what constituted an actual innovation within natural philosophical systematizing without whiggishly relying on later acceptance as a category of analysis.
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