I recently read Kalmus's book, Being the Change. It was published in 2019, evidently before his shift to activism. It's not bad, but it definitely has a LIB perspective; the latter half of the book focuses mainly on his individual efforts to reduce his own family's carbon footprint through urban homesteading and running a car on vegetable oil. There's a chapter toward the end about efforts to build community, but the organizations he mentions by name appear to have gone defunct (or at least ended their online engagement) during Covid.

Anywho, seems like his perspective is shifting. I wonder if we're about to witness the radicalization of a lot of scientists who were still thinking change was possible within existing systems.