> the idea that there is some type of “world peace” scenario with no violence, war, or corruption is a fairy tale not based in reality

Having grown up on Star Trek, I guess I'm still kinda optimistic that something like this is possible... But to take each part of this:

"violence" yes, is always going to happen... It's such a broadly defined term that it's hard to imagine a world without that.

"War," as we understand it, I genuinely think might become a thing of the past as we move into a post-State world.

"Corruption", again as we currently think about it, is almost universally a product of States having too much power and their agents in turn misusing said powers.

So I guess in summary I do think something like "world peace" is possible, but in a Post-(Mega)State world. Which we may very well see in our lifetime.