The Harvard Business Review says that about 70% of the senior executives and male alphas because men are given more opportunities.  This is mostly because alpha men are proud and people applaud them for being alpha. On the other hand, alpha women are also confident. But the people in their surroundings hardly support them. Rather, they always put them down and are asked to slow down and settle with family and kids. Some alpha women stick to their goals, but a part of them just gives up. This results in a vast difference in the ratio in the top executive positions.