Peace Defined As: a state of mutual harmony between people or groups, especially in personal relations I think so. And there's no need to wipe people off the planet to do so. It all comes down to human nature. Say an alien signal reaches the earth and we, decode it and confirm there's other life in the Universe. Now that's enough, but let's say the signal was an eviction notice, telling us all we need to leave or die off in 200 years. What'll happen is an US vs THEM mentality which is Human Nature. Suddenly, there'll be something intelligent and violent and it looks nothing like us. Be you Russian, Muslim extremist, a KKK member, a Homosexual vegan...it won't matter anymore because "We're in this together" mentality will prevail. And as such, World Peace. Until we go all Independence Day on em.