The Navi tells about the absolute peace that will reign in the world when Moshiach comes, affecting even the animal kingdom - “the wolf will lie with the lamb”. The root cause of this phenomenon will be the overwhelming “knowledge of Hashem” permeating every corner of the universe. Therein lies the key to attaining peace at all levels, even before its ultimate version in the era of Moshiach: introducing G-dliness elevates the factions at odds and can automatically dissolve the divisions.