A demanding performance challenge tends to create a Team. In any situation requiring a combination of multiple skills, experiences and judgments, a team inevitably gets better results than a collection of individuals. Teams provide the kind of responsiveness, speed, on-line customization and quality that is beyond the reach of individual performance.
Traditionally in American society, men have been trained for both competition and teamwork through sports, while women have been reared to merge their welfare with that of the family, with fewer opportunities for either independence or other team identifications, and fewer challenges to direct competition. In effect, women have been circumscribed within that unit where the benefit of one is most easily believed to be the benefit of all.