Left to nature alone, the population on earth would be give or take 50% men and 50% women, according to what's become known as Fisher's Principle. But look at the statistics: US has just 15% women in C-suite, only 20% senators or law firm partners. Women surgeons represent only 21% of surgeons. For all those who believe that women are more than adequately represented in the teaching profession, remember that only 24% of full time tenured professors are women. How do we explain this?