Vision: The shared goals and vision of the organization that allow people to work together.
Respect: The ability to work with other people in a mutually respectful way.
Decision-making Process: A method of understanding and making decisions that reduces conflict while allowing for adaptability.
Teams are formulated from different perspectives and personality and need some direction. Team leaders can off a vision and purpose for the team so that actions can be weighed as either moving toward those things or away from those things.
Likewise, teams are based on mutual respect. It is difficult to have a strong team if members are bickering, violating each other's boundaries, and self-seeking.
Finally, teams should have a formal mechanism for making decisions so that the loudest voice doesn't win. This mechanism can be a formal charter or it can be a dictatorship with the team lead making all final decisions.