The burden of proving how people can be said to be equal and how authority can also exist is on you to prove.
They are two opposing concepts and believing in both at the same time, requires an inversion of logic, therefore one position is in error.
Where do people get "authority" from and how does it occur if all people are said to be equal ?
I support the idea that you are the authority over your own life, but not over others lives and that you have the right to defend yourself. Do you agree with that?
It is inherent in human nature that 9 nations could live peacefully ruling themselves while that 10th nation will rise as an aggressor with free reign to enslave the other 9 nations. This isn't my opinion, it's historical fact. It's also backed up by all of nature, aside from our ability to inflict catastrophic out comes on the entire planet.
I believe we need some form of authority in a peaceful nation in order to protect that peaceful nation. Violence is not going away because free will by definition allows it to exist. I do believe as a species we are on a downward spiral to destruction and all that can be changed is the time scale.
Maybe one aggressive force ruling all nations would end all wars but as seen with cultures that have came close to that, other groups rise up to seize power or the dominating group rots from within until total collapse.
Expecting all people to rule their own lives is an ideal world but like the human body, if you remove all the white blood cells bad things have no check. Places still exist in this world where you can go and rule your own life. That does not exempt you from war or the wrath of bad men.
As a direct answer I guess. Aggression and peace define each other and neither will cease to exist although in varying amounts from place to place or time to time. Authority, historically is a big tool in allowing ''successful'' aggression and equally so it is required to ''defend'' your ideal way of life.
If the peaceful authority is lacking that nation is going to be oppressed, economically or physically. If the peaceful authority is stronger it will prevail but in time power corrupts. This is why I think our species is fucked. Our ability to use science is the biggest question for me. Would you say it's saved more than it's killed?.