When searching about for decent resources to help build a working hypothesis for worldbuilding in D&D, I came across bits on medieval demographics, sort of a "h

When searching about for decent resources to help build a working hypothesis for worldbuilding in D&D, I came across bits on medieval demographics, sort of a "how many peasants do you need for the village to have its own blacksmith" deal. Overall, a very grim view of the situation is a bit like trophic levels in a food web, with the farming peasants being the humble vegetation on which all others grazed, directly or indirectly. And certainly all of those tax records helped delineate just how much land was required. Fascinating stuff.