These eight aspects, and these eight precisely worded items, validly predict sustained team performance:

1. I am really enthusiastic about the mission of my company.

1. At work, I clearly understand what is expected of me.

1. In my team, I am surrounded by people who share my values.

1. I have the chance to use my strengths every day at work.

1. My teammates have my back.

1. I know I will be recognized for excellent work.

1. I have great confidence in my company’s future.

1. In my work, I am always challenged to grow.

You might notice a few things about these items right away. First, the team members are not directly rating their team leader or their company on anything—they are rating only their own feelings and experiences.

Whereas culture’s focus leans toward conformity to a common core of behaviors, teams focus on the opposite. Teams aren’t about sameness—they aren’t, at their best, about marching in lockstep. Instead they’re about unlocking what is unique about each of us, in the service of something shared. A team, at its finest, insists on the unique contribution of each of its members, and is the best way we humans have ever come up with of harnessing those distinctive contributions together in the service of something that none of us could do alone.

Diversity isn’t an impediment to building a great team—rather, it’s the fundamental ingredient without which a great team cannot exist. If we were all the same, there would doubtless be things that all of us could not do, and that therefore the team could not do. We need to partner with people whose strengths—whose weirdness, whose spikiness—is different from ours if we are to achieve results that demand more abilities than any of us has alone. And this means, in turn, that the more different we are from one another, the more we need one another. The more different we are, the more we rely on understanding and appreciating the strengths of others, and on building a shared understanding of purpose, and an atmosphere of safety and trust, so that those strengths can be most usefully put to work. Well-roundedness is a misguided and futile objective when it comes to individual people; but when it comes to teams, it’s an absolute necessity. The more diverse the team members, the more weird, spiky, and idiosyncratic they are, the more well-rounded the team.

Two questions in the survey showed the strongest relationship to a worker’s feeling of trust in his team leader:

• Do I know clearly what is expected of me at work?

• Do I have the chance to use my strengths every day?

This data suggests that these two conditions—knowing what is expected, and being able to play to one’s strengths—are the foundations of trust. When a team leader, despite the ambiguities and the fluid and fast pace of the world of work, can help team members feel clarity about expectations and a sense that their best is recognized and utilized frequently, then trust is built, and a Fully Engaged team becomes more likely.

One way to think of these results is to imagine a team leader having three distinct jobs. Her first is to ensure her team members feel connected to the purpose and future of the company, even though she may not directly define those. Her second is to ensure that her team members, as a group, understand and support one another. And her third is to ensure that her team members, individually, understand what’s expected of them and how they can do their best work now and in the future, all while feeling recognized for who they are.