Holly ArrowDr. Arrow has two major research interests. The first is the formation and development of small groups as complex dynamic systems. The second is the psychology of war, in particular the evolution of social capacities that help men and women cope withthe challenges to survival and reproductive success posed by war. Topics of recent papers include gender relations in the military, the evolution of heroism, the role of friendship in dissolving the social anxiety of outgroup interactions, sources of cohesion in groups of different sizes, and using complexity to improve the effectiveness of groups in health care. Read More Read Less