Henry Sumner Maines' Popular Government
I first heard of Henry Sumner Maine and his book Popular Government several years ago, back when Neoreaction was a growing, relevant school on the Right. Indeed, Popular Government was reviewed by such NRx stalwarts as Foseti and Radish, both obscure now but highly regarded in their own niche, not long ago in the grand scheme of things, but in internet terms they may as well have been contemporaries of the presocratics.