> As long as the team works good, doesn’t do any harm, doesn’t break any laws, doesn’t hurt other teams performance Discriminating against people of other ethn

> As long as the team works good, doesn’t do any harm, doesn’t break any laws, doesn’t hurt other teams performance Discriminating against people of other ethnicities who are applying for a job on the team hurts those candidates, surely. In the US, doing so would break anti-discrimination laws. And if the team is too insular, or if their business is conducted in languages that other teams in the company don't speak, then other teams' performance will definately be negatively impacted. If records—even emails—are written in a language other people in the company can't read, that's even worse; it can become impossible to audit the team's work, fix things that might go wrong, or pick up the pieces if the team breaks up. Even if the internal effectiveness of a team like this is high, that effectiveness is almost certainly outweighed by these negative effects.