Diversity is a reality of life and therefore a reality of any society or team. Examples in everyday life:
The human body (legs, heart, eyes, head, hands etc.)
A soccer team (strikers, defenders, coach, doctors etc.)
A nation has different tribes and even within tribes there is clans.
Government (president, judiciary, cabinet, security forces etc.)
Its possible for diversity to be used for unity as opposed as a basis for division. The Bible is full of pictures of diversity that work in unity (Teamwork)
The Trinity (God the Father, Son and Holy Spirit).
12 Tribes of Israel conquering the Promised Land.
The Church composed of Jews and Gentiles called to be one (Galatians 3:28)