In the past decade, there has been some scientific debate in regard to potential changes in the human species. In studying the genes of X and Y chromosomes, it appears that there is less genetic material in the Y or male chromosomes. And when compared to other mammals, there seems to be a pattern of the genes in the Y turning off over time. The Y component produces male testes and the male form of the species. But if it slowly fades away through an evolutionary process, that would mean that humans are moving toward a woman dominated society. At that point, scientists wonder how human beings would be able to reproduce.
In nature, mutations occur to solve such problems. Some animals can actually change gender in order to procreate. Others could possibly fold their genetic strands upon themselves to create a pregnancy with complete XX genetic material.
In any such transition period, the female population would statistically grow larger than the male population. Females would become the dominate society leaders. Females would then set the standards for procreation including identifying their attributes for their mates. In advanced cultures, this can take technology to the new level to remove the male element from the procreation process all together.
In the background of LOST, we see hints of this evolutionary process taking shape.
In the Others camp, Ben was the sadistic leader who had the power, but females like Juliet are smarter, shrewder and have more common sense to survive.
In the beach camp, Jack was the reluctant leader, but Kate seemed to have more common sense survival skills on their missions. She also had the skills to manipulate men to do what she wanted them to do for her. Also, Rose was a more dominate character than her husband, Bernard. Sun had a much more global perspective than Jin.
And the idea that Sun became pregnant on the island when she and Jin were infertile couple touches upon the end of the evolutionary cycle where females are self-producing their own offspring. Interestingly, her offspring was a girl.
The female characters in the series were reserved but had deeper strengths than most of their male counterparts.