pull down to refresh

Sounds like a version of Graeber's Debt: The First 5,000 Years.
What I found nice here,
mean that money was invented to measure blood debt. It's just as plausible that it arose as a form of economic debt.
is that blood debt is a market good like any other (well, service I guess). So as you observe, it boils down to what's a marker, and what constitutes economic trade.
Pretty unpersuasive to me; looks very barter/MoE-y even if its first use was to codify blood feud reparations