Can we live in a world without government?

No, it would be non stop violence and chaos.  Humans tried that for thousands of years.  Governments emerged because people wanted government to emerge.

Yes world would be peaceful without religion no government no laws no authorities no police no rules full of freedom and happiness everywhere. 

And if that world existed you couldn't make it 3 feet without someone cutting your throat for fun since there would be no law and order. 

If you want to learn about libertarianism you can start by reading (aier dot org). We could have avoided all this covid fascism if we lived in a libertarian society, so it's worth considering even if you don't accept it entirely.

Yes and open carry allowed. Take the law into your own hands kind of thing. Vigilantes allowed.

Any "society" has to be organised ,somehow -- anarchic and disorganised groups do not exist anywhere in the animal kingdom

We'll eventually come to a point of chaos because people get tired of government, then people will regret getting tired of government. The perfect world doesn't exist, and the loop continues because human beings are stupid enough to think one does. X'D

Most people could but most ain't everyone and those jerks mess it up for the rest of us.