Since 2009, board diversity in U.S. public companies has not moved, with women holding approximately 16% of board seats of Fortune 500 companies, an increase of less than 1%. In other words, there has been no change. Among the lessons of the financial crisis is that entrenched boards may have contributed to the problem. According to a number of studies, board diversity can help guard against "groupthink" which is more likely to occur among cohesive groups lacking social, cultural and ideological