The fundamental aspects of Darwin's Theory of Evolution is: Survival Of The Fittest
Charles Darwin had given various postulates of his well known theory some of which are as follows:
[i] favorable conditions allow a population to increase,
[ii] Environmental pressures in time,
[iii] Competition with each other to survive.
In evolutionary theory the survival of only those organisms best able (fittest) to obtain and utilize resources. This phenomenon is the cornerstone of Darwin's theory of evolution by natural selection.
This is the basic theory that is applied to all the species in the universe
The application of this very theory to the human family has revealed that even in the minuscule family consisting of a man and a woman i.e. husband and wife the same traits are prominent.
In the matriarchal family the female dominates and the male subordinates. In short the beast of burden is the male and the female rules.
This is depicted in this sculpture.