Diversity is the crucial element for group creativity. Innovation teams tasked with creating new products or technologies or iterating existing ones need tension to produce breakthroughs, and tension comes from diverse points of view. This is the opposite of groupthink, the creativity-killing phenomenon of too much agreement and too similar perspectives that often paralyzes otherwise great teams. We’ve all been on these teams. Everyone is just like us — say, marketers or engineers. Consensus comes quickly, and only later, when we fail and wonder why, do we realize that the easy agreements and shared conclusions doomed us from the start.