Elizabeth Kolbert has an interesting book review on population, with a nitrogen lede, at The New Yorker. It mentions in passing an assessment that nitrogen fixation added two years to the length of the first world war. I’ve heard similar broad claims but would be interested in more detailed analysis; perhaps some is provided or referenced in Alan Weisman’s “Countdown” (Amazon UK|US), one of the books under review.
The review’s a run through some current anti-natalism and pro-natalism books. The context is the twentieth-century population growth allowed by Haber-Bosch nitrogen fixation and its continuation, abatement or reversal, and the fight between malthusians and cornucopians, though she doesn’t really pick a side on that. She acknowledges that malthusianism ahas so far been wrong, but not that it has to be.
Weisman is the anti-natalist, and fits my general stereotyping by being a man in his sixties (rule of thumb: when in an environmental conversation that has previously not been about population someone declares that the fundamental problem is population, but no one wants to talk about it, that someone will be an older man). Apparently he thinks that about 2 billion might be a “natural” population level and that this century will determine an “optimal” level for population (which from the context might be the level supportable after a large scale die off). It sounds as though I should probably look at this book, though I doubt I am going to enjoy it.
A little nit-picking. For those of us with an interest in photosynthesis (and if you don’t have such an interest, I have a book to recommend to you….) the idea that, thanks to Haber-Bosch. you and I “are eating bread made of air, and so, in a sense, are made of air as well,” draws a smile. Where does she think the rest of the bread comes from, if not from the air? I also think it’s a trifle unfair to give the impression that William Crookes was a straightforward malthusian when he specifically noted that chemical technology could and should solve the crisis of fertiliser supply that he saw coming. And while it’s her call to quote E O Wilson calling human population growth as “more bacterial than primate” (a quote she’s used before) equating humans with pestilence in that way always sets my teeth on edge.
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