When we trust each other in a team, we can be careless as well. We do not worry whether or not the other people on the team have our best interests at heart. We do not worry whether or not they have the shared interests and goals of the team at heart. We do not worry about their character, or about their capacities. We do not have to watch our backs. We believe in them. And we know their track record. As a result, we invest ourselves.