Aristotle suggested that friends must "be useful to one another

If we substitute the word "team members" for "friends" we can develop skills and enhance our value to the organization by focusing on improving our skills as an effective members of a community.
Team Members must be Useful to One Another This is what a team is for.
To develop a network and system of shared usefulness.
A shared usefulness where there is a shared knowledge of roles and responsibilities for each member of the department.
Team members that have satisfaction with their jobs and stay with a company for years have developed a deep understanding of reciprocal tasks and responsibilities with the other members' roles.
This returns to the concept of "being a team member as opposed to making oneself desirable for membership in the team".
Once an organization has a mission of usefulness to one another, the culture created is one that reciprocates talents to enhance the others to achieve success.
Why? Because they are acting as an individual who is able to show respect and reciprocity, they behave in a manner that is reciprocal and comes from an internal motivation to be a useful to their organization and community.
Developing a culture of goals and metrics that are team focused, where people can act in self-directed ways that multiply the effectiveness of the entire organization.
Like an orchestra, each team member is a specialist and knows just when to be useful, in resonance with the organization.

• How can team members be useful to each other?
• Why would this help a team succeed?
• What is needed within a team culture to develop "usefulness"?
• Should team members be friends?