Divergent opinions rule

A carpenter sees every problem as a nail is the saying. When your team is made up of individuals with all the same background there are very few different perspectives offered. Diversity is the solution and hire different.

"NASA employees today are far more likely to have come to the agency directly out of graduate school, which means they are also far less likely to have divergent opinions. That matters because, in small groups, diversity of opinion is the single best guarantee that the group will reap benefits from face-to-face discussion."