Biology vs chemistry
Unless you’ve been living alone in a cave (which is actually possible, given ubiquitous internet access and the fact that some of you like grunge metal), it’s safe to say you’ve been a member of a team at some point.
If so, have you ever been part of a team of bright, talented folks who are ineffective working together? It's a condition I affectionately refer to as the “Smart-Members-Dumb-Team” disorder. If your team has well-qualified participants, but little gets done and objectives aren't met, you're probably afflicted with SMDT. In small organizations this disorder can be quickly recognized and treated, but in larger companies SMDT can go undetected for months.
In some cases (especially in high-tech environments) the afflicted teams are populated by exceptionally brilliant individuals—who often know it and have little patience for others deemed less brilliant.
But whether we're talking raw intelligence or other inherited abilities, a team can have good biology (genetic gifts) but lousy chemistry (an ability to work together to exploit collective abilities). The whole turns out to be less than the sum of its parts.