Pretty self-explanatory. A war without conflict would be nice, but it would also be impossible. Human beings create conflict, even in it's absence. So, ironically, the only world without war would be a world after a war that killed everyone.
It is impossible. When people are like "Kurai, why don't you want world peace?! You're such a f'ing pessimist!" I'm like "Do I want world peace? Yeah it would be cool. Do I believe it's possible? Sorry, no." "PESSIMIST!" "You can go with that."