Do you think there will ever be world peace? Why or why not?

No, because humans are terrible at solving problems in an appropriate way. Also humans are f*cked up, and selfish; so they can't find a solution everyone is okay with, so they try to deal with it in many different ways, often including war.

I think not human beings simply cannot understand each other and they never will

in the far future

No. Because humans act only in self interest. (Geez, this is starting to get repetitive.)

Honestly, I think if everyone ever said this and agreed with it, this would make a yes:
Yes, we are quite kind. I just hope the best
OR
No, We should improve some stuff.

No way. Farmers kill cows, pigs, chickens, lambs and ducks everyday. Bullies will bully others simply because of their looks. People throw tantrums if others don't do things they want them to do. Never had, never will. :p

Hopefully not.