The 6th Co-operative Principle explicitly urges co-operation among co-operatives. Self- help is a pillar of the co-operative movement and mutual self-help by co-operation among co-operatives is a crucial part of expanding the co-operative enterprise sector of the economy, both nationally and globally. Co-operation among co-operatives will, at times, require sacrifice to achieve shared goals. this can present challenges where for example collective mutual interests override what may be beneficial to an individual co-operative in the shorter-term.

Effective co-operation takes time, resources, and problem-solving skills. It also requires the application of the 2nd democratic Principle: there must be open, transparent, accountable, democratic decision making processes where co-operatives work together for mutual benefit. throughout its history the co-operative movement has achieved effective co-operation among co-operatives through specific, living examples and the evolution of overarching best practices.