is postmodernism a totalitarian narrative? In other words, can an argument for a diversity of discourses be a dominating discourse? I'd say: only if you're doing it wrong. — Kenosha Kid
That's a question that resonates both with the current post-truth moment and with the little piece of philosophy history I have wanted to add to the puzzle.
It's about structuralism or rather, since I never thought very highly of the term 'structuralism', about the contribution of Claude Lévi-Strauss and more broadly ethnology to the issue of cultural diversity vs. universalism.
You started your OP on the following para:
The 'postmodern condition' was coined to describe the fall of metanarratives after the two world wars (or between them, depending on what you count). The story goes something like this... — Kenosha Kid
The OP goes on to describe a broad historical arch, in which (in short) the horrors of the two world wars led to a form of western self-disgust, to spreading doubts in said metanarratives, and to decolonization. Pomo would have diagnosed this historical condition, or alternatively reenforced it.
I agree with your description and congratulate you for it. Nice synthesis. But I think an important piece is missing between WW2 and the rise of Pomo: the story of Levi-Strauss' interactions with and contributions to UNESCO on the issues of racism after WW2.
When you speak of the horrors of the two world wars, you mean (or I hear) the horrors of racism, ultra nationalism, and the Holocaust: the mobilisation of science and technology to murder entire nations on an industrial scale.
We must remember that racism was politically correct before WW2, and politically useful in justifying colonisation. Many European scientists, philosophers, medical doctors, political activists etc. before WW2 were casually racist. The 'white race' was typically seen as the pinacle of human genetic evolution, and Europe as the pinacle of cultural evolution. Other 'races' and nations were seen as evidently inferior, genetically and/or culturally, reason for which Europe was able to colonize them. That metanarrative was fundamentally ethnocentrism and racist, and a lot of European academics - right or left - were just fine with it, not just Heidegger.
Yet WW1 had already put a dent on it. Ergo dadaism and surrealism can be seen as reactions against grand but bloody nationalistic, colonial and scientistic discourses. E.g. the love of 'native arts' by the surrealists is a way of saying: "Europe is full of itself but Africans are artists too, 'savages' have an important culture too."
By that time, between the two WW, ethnographers / anthropologists were starting to say the same thing. It was a science which originally had served colonisation well: the colonizer needed to understand the colonized, in order to better control and rule him, and ethnographers were commissioned to do this decrypting of the colonized. There was also the idea that ancestral customs would disappear quite fast thanks to colonization and you know, the inevitable progress of the one and unique form of civilization (European). So these ancient customs had to be documented before they disappear.
The problem was, these people (ethnographers) often fell in awe with the cultures they were documenting. And many of them started to argue
against colonization. Leiris is a case in point.
All this changed radically after the Holocaust. Racism was suddenly seen as downright evil, and the very concept of race was being redefined or denied validity. The recently created United Nations Education, Science and Culture Organisation (UNESCO), headquartered in Paris, saw this fight against racism as it main mission.
In the early 1950's UNESCO published its statement on race as a social construct and the essay Race and History by Claude Lévi-Strauss. LS had contributed to the UNESCO statement on race, together with other scientists and academics. Two decades later, in 1971 Levi Strauss gave a conference at UNESCO entitled Race and Culture, which made
a nice little scandal.
Historically this sequence fits right in between WW2 and the rise of Pomo in the late 60's. (There's an epilogue in 2005 but it doesn't add much, it's a mere confirmation of points already made in 52 and 71). The story is analysed in some detail here:
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4326674/
The two papers (Race and History + Race and Culture) competently build upon modern genetics and ethnography, and draw the same broad picture of a world threatened by a fake form of universalism.
TBC...