So how do you engineer groups that can problem-solve effectively? First of all, seed them with, basically, caring people. Group intelligence is correlated, Malone and his colleagues found, with the average social sensitivity — the openness, and receptiveness, to others — of a group’s constituents. The emotional intelligence of group members, in other words, serves the cognitive intelligence of the group overall. And this means that — wait for it — groups with more women tend to be smarter than groups with more men. (As Malone put it: “More females, more intelligence.”) That’s largely mediated by the researchers’ social sensitivity findings: Women tend to be more socially sensitive than men — per Science! — which means that, overall, more women = more emotional intelligence = more group intelligence.