I just finished David Graeber's "Debt", and it really enlightened me on this subject more than anything in that reddit thread. It's one of the most scholarly, informative, provocative books I've read in a very long time. I'm actually reading it a second time through, just to make sure I understand it all.
I've been reading large chunks of that and it's both good and bad. The good parts are where he sticks to his core strength of anthropology -- it's filled with fascinating descriptions of how commerce and law worked in various societies, ancient and modern, from the Irish monks who sat down and figured out the precise compensation that you need to pay if one of your bee stings another man [the regular price of the sti…
This is the part where I think he actually is on pretty solid historical ground. Almost every society in history has had significant problems with, and a backlash against, at least certain kinds of debt, where it didn't really seem to be in the interest of both parties. They don't really seem like outlier cases. Most societies seem to have dealt with it by deciding that it's not actually good to require repayment in every circumstance, especially if the debt persists for a while. That's why you have things like the biblical Jubilee---periodic cancellation of all debts---in many societies.