AKA: Co-op, Collectives
There are many types of co-ops including housing co-ops (which buy homes with collective resources to provide for lower rents), food co-ops (which purchase food with collective resources to provide for lower food prices), and car co-ops (which purchase cars with collective resources to provide occasional access to transportation for low costs).
Cooperatives can be non-profit or for-profit, with excess revenues usually being reinvested in the common resources (cars, stores, houses).
There are many things that block successful cooperation including habits, a lack of confidence, self-interest or indifference. Some people may not be cooperative because they fear retibution from third parties or they fell superior to a cooperative effort.
Many people know that sharing things equally, together with cooperation lies is at the heart of achieving world peace. International Treaties wouldn't exist if not for cooperation by the parties involved.