The Rochdale Society of Equitable Pioneers commences business at its cooperative in Rochdale, England, starting the Cooperative movement.

The history of the cooperative movement concerns the origins and history of cooperatives across the world. Although cooperative arrangements, such as mutual insurance, and principles of cooperation existed long before, the cooperative movement began with the application of cooperative principles to business organization.

The Rochdale Society of Equitable Pioneers, founded in 1844, was an early consumer co-operative, and one of the first to pay a patronage dividend, forming the basis for the modern co-operative movement.

Although other co-operatives preceded them, the Rochdale Pioneers' co-operative became the prototype for societies in Great Britain. The Rochdale Pioneers are most famous for designing the Rochdale Principles, a set of principles of co-operation that provide the foundation for the principles on which co-ops around the world operate to this day. The model the Rochdale Pioneers used is a focus of study within co-operative economics.