Guys, why do you believe in a "pecking order"?

This belief among men that there's this invisible structure and hierarchy that needs to be obeyed. Where does it come from?

My brother believed in it.. my dad tried forcing me to believe in it. Guys in highschool believed in it. The mentality is celebrated among military types and older business-type men.

In the southern US, it's practically a fucking religion.

Meanwhile here I am wondering what all this monkey business is about.
Guys, why do you believe in a "pecking order"?
Post Opinion