We can see it in the physical aspect between men and women. There are jobs that women cannot do unlike men. Also, as we look back in the past, men are warriors because they have strength and capability to undergo in a war unlike with the women. Therefore, history declared that women are inferior to men but as of now, there is what we called egalitarianism.
There is nothing wrong in admitting that the women are physically inferior to men. In normal cases, women may not be able to beat men in sports such as boxing or wrestling. But why concentrate on these fields? It will be much better to concentrate on those fields, where women can compete with men on equal footing.