WIKIS EDITING

Hello, everybody!

I create WIKI publication. 
I saw a submit button and sent the post.
I saw the edit button and edited the post.

I started reading through the WIKIS posts and at some point
I realized that I could edit every single post there.
Regardless, I'm not an author. Is this normal?
I wouldn't want anyone to edit my posts.
Is it possible to prevent other people from editing my posts and how?

Greetings!