Is it me, or are historians afraid of interdisciplinary review? Most experts or whatever competent judges in whatever field (economics, philosophy, biology, etc.) all seem to hate when other people chime in via their different perspectives. Historians, anthropologists, archaeologists (although perhaps less so with them), all seem to be particularly easily to dismiss things historically that may be deduced via other means. Which goes back to Diamond - the fact is some of his general ideas are indeed plausible, but there seems to be an outright rejection/strawmanning of his positions. He is clearly not a historian and clearly makes mistakes quite often, but some of the pushback (ie Park's) in this thread I feel seems to be out of almost a sense of fear than it is on his content (and there is plenty in his content to criticize).
Same happens in other fields of course, but don't know - just seems particularly pronounced in history.
This is a sort of bizarre line to take, given that the trend over the last few decades in academic history - and indeed academia in general - is to value "interdisciplinarity" as a Thing In Itself regardless of the concrete benefits of whatever interdisciplinarity entails. That was the entire foundation for the linguistic and cultural turns, after all, which were only the most important historiographical developments of the past half-century.
I don't think that historians in general pooh-pooh Diamond's work because it incorporates anthropological, biological, and ecological evidence. Some obviously do, but there are simply so many other historians who employ those sorts of data themselves that it would be ridiculous to react against Diamond for doing the same. It's also important to note that
not everybody thinks that Diamond sucks. I don't even think that
most academic historians do. You'll find
Guns, Germs, and Steel as required reading in high school and undergraduate courses all throughout the world, even in history classes that don't really deal with the Americas. Professors and teachers don't have to agree with required reading, of course, but in my experience few of them assign it purely to tease out criticisms of it.
Of course there are some very vocal and virulent detractors of Diamond's two vaguely history-related books, but you'll find such people around any history books that reach the popular imagination. Chris Browning had to deal with an incredibly loud backlash against
Ordinary Men, even though most of academia accepted his conclusions, because there was a vocal minority who disagreed with them. It would be silly to conclude from the existence of Daniel Goldhagen that historians don't like it when people (in this case, Browning) apply psychological studies to history. So it is with Diamond.
And with all that said, there
are reasons for not particularly liking either
Guns, Germs, and Steel or
Collapse. While the evidentiary basis for both works is,
in general, sound, there are some sections that appear to rely on superseded or methodologically dubious findings. The fact that Diamond's most vocal detractors have seized on these as being indicative of the intellectual bankruptcy of his entire oeuvre, which obviously goes too far, does not mean that those factual issues do not exist. Another point is that
Guns, Germs, and Steel, at least, while broadly correct, is mostly correct because its findings are not exactly news to academic history or anthropology. Diamond was not the first, or even the hundred thousandth, person to point out that colonizing powers often possessed key technological advantages over the inhabitants of the places that they colonized, to note that disease was often a key factor in human history in various ways, or to mention the economic advantages of local flora and fauna. And finally, there's the ongoing debate about how much of a role Diamond assigned to ecological/biological factors in determining historical causation; there are good reasons for claiming that he stressed his evidence far beyond its limits, and there are good reasons for claiming that he, well, didn't. (I think that if you look at both
Collapse and
GGS together, the former conclusion seems more reasonable, but if you look at certain specific chapters, especially in
GGS, the latter is more appropriate.)
I, personally, don't really care about the whole thing that much. Nothing that Diamond has written has any relevance for the academic history that I deal with. Most of the time, my main contact with what he wrote is either in dealing with incessant debates about him between people who
do care about such issues (especially on CFC) or in dealing with enthusiasts of his who take everything to extremes and start bringing up biological/ecological considerations in places where they are patently ridiculous with no evidentiary basis, such as the claims that anthropogenic climate change destroyed the Western Roman Empire. Those sorts of people show up with any author writing for a popular market. (Not that pop-science/-history/-philosophy/-whatever writers publish books that automatically suck
because of their provenance. And it's not that popularizing academic topics is a bad thing, far from it. It's just that
most people who write for a popular audience either get things wrong by relying on perspectives that have fallen into disfavor or by failing to account for more recent and well-accepted views, or they say things that, while not
wrong, also fail to take account of more recent academic writing, creating sometimes very sizable holes. It's a tendency, is all.)