Diverse groups trust each other less, that is often framed as a positive (your workers are less likely to unionize!!) but you can clearly see why it can also be

Diverse groups trust each other less, that is often framed as a positive (your workers are less likely to unionize!!) but you can clearly see why it can also be a very negative thing for teamwork. So in general you want diversity when you want weak subordinates that are easy to control, that is the main advantage companies are really after. The other thing is if you want a group of people that holds each other accountable, since diverse groups are less trusting they are less likely to conspire, so useful on boards etc.