Wealthy patriarchs accumulate callable favors through hierarchical obligations [fact]
The most extreme examples are in hierarchically structured extended family settings, in which a patriarch (or "godfather") holds an extraordinarily large set of obligations that he can call in at any time to get what he wants done. Near this extreme are villages in traditional settings that are highly stratified, with certain wealthy families who, because of their wealth, have built up extensive credits that they can call in at any time.
DEFINE: Illustrates how social capital functions as favor-credit in stratified traditional settings, contrasted with transactional exchange.
Coleman, SocialCapitalCreation-1988, loc. 92