Even if experiments in social currencies occupy the forefront of the recent economic scene, these new forms of trade come from a long historical lineage of monetary experiments considered as utopian and/or socialist. By using a social currency from the 19th century (the zero-interest credit) as an instrument of monetary system reform, P. J. Proudhon seems to have proposed the theoretical bases explaining the existence of social currencies today.
- reform of the monetary system
- the mutual and free credit
- the bank of exchange
- the bank of the people
- social currency