A team that wants to grow and learn is unstoppable, antifragile.

But ones that are defensive and closed are toxic.

They'll freak out about every bit of ambiguity or things that aren't perfect.

What's the difference?

Trust.

The former trusts the team: either one another individually, or the collective as a thing itself, or the charismatic leader.

But they believe that they will be safe, that they'll be in an environment to grow.

You can grow in any environment. All it takes is you believing you can grow.