https://substack.com/@freaktakes - Freak Takes by Eric Gilliam. On how we did great science, how we built the insititutions and the organizations that did them etc. Essentially a kind of metascience perspective. Pretty fantastic blog in my opinion. (Damn. just saw it. freaktakes is already there)
https://substack.com/@antonhowes - Age of invention by Anton Howes. A history blog. More focused on English side obviosuly, but deals with europe from time to time as well as certain mentions from around the world as well.
https://substack.com/@woodfromeden - Wood from Eden by Tove K and Anders L. This one kind of depends on one's taste. but i find this blog pretty insightful and fascinating. certain posts come with anthropological and sociological mix as well as lots of posts on their day to day life (but they remain behind paywall. Her well argued posts remain free and things she isn't that sure of or hasn't put much attention into, remain behind paywall)