I examine here the choice of partners, relational marriages, and the creation of quasi-family groups, as well as divorce, relationship breakdown, excluding others as a consequence of trust being broken, and classical forms of collective commercial dynamics: agreements, alliances, coalitions, networks, etc. The normative disapproval of economic sociability is part of the myth of pure and perfect competition, focusing on sellers rather than buyers. There is a need to see economic sociability in a more positive and less powerfully normative light, especially as concerns exchange, trade, and market power.