Why have dairy processors formed cooperatives?

In the 19th century, French dairy production was a subsistence economy, as farmers produced essentially for their own needs. With urbanization and rural flight, consumption of dairy products rose in towns and cities.
 

Later, with the growth and globalization of trade, farmers decided to defend their production activities, forming groups in the belief that they would succeed better collectively than individually. They pooled their resources and assigned cooperatives the role of organizing production and sales, and protecting their access to the market.