Of course there will be.By humanity being a social species and benefiting us, individuals,groups, countries, etc that course conflict will eventually be weeded out (survival of the fittest).Humanity is just in it's infancy, we still have billions upon billions of years to grow up and evolve.
Eventually, we will become a Type I civilization, and when our technology is that great, there will be no reason to remain divided into countries. Once there's one single government, peace will be inevitable. Not saying this will happen anytime soon, but eventually, it will. Unless we all die.
When the Immortal Emperor lays his dominion over this world, then there can be true peace.
For there to be world peace, every single country and region would have to be free of war. This will never happen...
Even animals fight.
There will only be world peace when everyone is perfect.
We are violent creatures.