Absolutely! We will have lasting peace on earth when the Prince of Peace returns. Jesus Christ has told us, and the Bible assures us, that He will come back again. When He comes, several things are going to happen. First, the rebellion of man against God is going to be put down. For a thousand-year period, God will restrain the evil that is in man and will not allow nations to fight one another (see Revelation 20:3-6). When that happens, men will take the tools of war and turn them into tools of peace.
Isaiah 2:4 says that men will beat their swords into plowshares and their spears into pruning hooks, and that people will not learn war anymore. With Satan out of the way, and man restrained, there will finally be peace.
The Bible goes on to say: “When the thousand years have expired, Satan will be released from his prison and will go out to deceive the nations which are in the four corners of the earth, Gog and Magog, to gather them together to battle, whose number is as the sand of the sea. They went up on the breadth of the earth and surrounded the camp of the saints and the beloved city. And fire came down from God out of heaven and devoured them (Revelation 20:7-9).
When this prophecy is fulfilled, when Satan’s final rebellion is crushed, there will be permanent peace. God will put away, out of His kingdom forever, everything that offends. He will take Satan and his followers and put them permanently into a place of captivity. From that time forward, there will never again be war. Until the earthly reign of Jesus comes, however, men will continue to fight one another. Jesus said there will be “wars and rumors of wars” right up until the time of the end (see Matthew 24:6).
There is no way that a United Nations, a League of Nations, peace treaties, disarmament treaties, or any other human instrument can bring about peace. Such things mean nothing when one nation desires the land and resources of another. A lasting peace will never be built upon man’s efforts, because man is sinful, vicious, and wicked. Until men are changed and Satan’s power is removed, there will not be peace on earth.
Until that day comes, all we can do is be strong enough to restrain the evil that is among us. To do anything other than that is utopian and based upon wishful thinking rather than upon reality.