Why rich smart attractive males avoid marriage? Why religions teach you to get married? Why feminazis prevent consenting females from accepting high paying jobs and escaping patriarchal oppression? Why force and deceit are often more politically correct than consent in getting a mate? What should you do to help your self?
If this keep going then people will all try to be martial artists rather than farmers. So some societies come up with better ways to encourage acts that promote common interests more.
One such arrangements are democracy.
To understand how monogamy work, we need to understand the ancient Greek. The ancient Greek is the first democratic countries in the world.
Democracy has one benefit. Democracy replaces civil war. When we have different opinions of what governments should do, we can settle our different by voting rather than killing each other.
Democracy is also a stable social contract. If some guy get 80% of the vote. The other side will know that they won’t win anyway if they wage a civil war. So they may as well yield.
It comes with pluses and minus of course.
In ancient time, only the male can vote. Why? That’s because males are stronger than females. We are trying to replace a civil war you see.
If 60% of the population vote for Julius Caesar, but all of which are females, obviously it wouldn’t be a stable social contract. The other side will fight anyway rather than honoring the social contract.