Don Jose Arizmendiarrieta, guiding light of the Mondragon Cooperatives in the Basque region of Spain, discussing the idea of plural economies:

In the mind of the co-operators is the idea that future society probably must be pluralistic in all its organisations including the economic. There will be action and interaction of publicly owned firms and private firms, the market and planning, entities of paternalistic style, capitalist or social. Every juncture, the nature of every activity, the level of evolution and the development of every community, will require a special treatment but not limited to one form of organisation, if we believe in and love man, his liberty, and justice, and democracy.

W.F. Whyte and K.K. Whyte, Making Mondragon: The Growth and Dynamics of the Mondragon Cooperative Complex, 1991: 255.