# Exchange

People have traded since long before money. Markets, gifts and sharing within a family are different ways to pass things between people, and every society mixes them in its own way.

Connects to:
- [Contact and exchange](https://mapideas.org/i/cu_exchange)
- [What is fair?](https://mapideas.org/i/q_x_fair)

Sources:
- [Wikipedia: Trade](https://en.wikipedia.org/wiki/Trade)
- [Wikipedia: Gift economy](https://en.wikipedia.org/wiki/Gift_economy)

Source: https://mapideas.org/i/so_trade · open on the map: https://mapideas.org/#so_trade