Teams and workplace groups are mini-societies in themselves, subject to everything which surrounds them, sometimes 'infecting' them like a contagious disease:
-racism
-sexism
-prejudice towards disabled people
-ageism
-homophobia

There s also potential for powerful conflicts surrounding leadership:
-rivalry
-jealousy
-competing with each other in an unhelpful way

The goal is to utilise the strengths of the team's participants and negate their weaknesses in the best way possible. It is best to concentrate on problem behaviour, not problem people.
The keynote is awareness - change can follow from this.