You have to build trust among team members so that people feel free to admit what they don't know, make mistakes, ask for help if they need it, apologize when necessary, and not hold back their opinions.
Smaller groups of people can establish trusting relationships.
Teamwork requires some sacrifice up front; people who work as a team have to put the collective needs of the group ahead of their individual interests.
Teamwork is a strategic decision.
Team synergy has an extraordinary impact on business results.
People who have a sense of peace that their priorities are in the right place also have a sense of humility and a realistic view on life.