Quick thoughts on this:
I would not equate degrowth and self-sufficiency. While it's plausible and possibly even necessary to increase self-sufficiency in a successful degrowth scenario, there should still be abundant international trade on important sectors. Degrowth is not a turn away from technology in eg. low-carbon energy production, electrification and bioeconomy.
Ensuring defense capabilities is of course vital, especially in the short term, and can be achieved through prioritization of resource use. Notably, in the long term the turn away from geopolitical competition, weakening the influence of fossil and military-industrial capital, increased self-sufficiency in resource use and increased global solidarity (in eg. trade policy, climate policy, development policy) would all greatly serve to promote peace and the decrease of tensions. This is not to say one should be naive towards governments like Putin's authoritarian Russia.
While this might sound like a lot of things lumped together, for example this research article is helpful in understanding how all these things relate: https://zenodo.org/records/15529759
Good comment. I think one potential audience would be people who (like myself) want to work in the intersections of activism, research and politics. It's not a huge demographic, but I think it's a demographic that should take it up as one of their tasks to create more popularized narratives based on this kind of research. Also a demographic that is likely overrepresented here. The abstraction is there, but I still think it's one of the most motivating research papers I've read in a while.