They shall beat their swords into plowshares, and their spears into pruning hooks; nation shall not lift up sword against nation, neither shall they learn war anymore. Isaiah 2:4
If you visit the United Nations in New York City, look for the sculpture by Soviet artist Yvgeny Vuchetich of a man beating a sword into a plow. The sculpture depicts Isaiah 2:4 and suggests the mission of the UN is to convert implements of war into tools of peace. But that mission cannot happen by human effort, for the passage in Isaiah talks about the Millennial Reign of Christ.
The Bible is filled with information about this future golden era in which Christ, having returned to earth at the end of the Great Tribulation, will reign on earth for a thousand years (Revelation 20:1-6). The prophet Isaiah described the harmony and happiness of this period (Isaiah 11:1-9).
As believers, the Millennium is not to be feared. It will bring peace, prosperity, purity, prolonged life, and personal joy. It will be a time when the earth will be filled with the knowledge of the Lord, and it will serve as a prelude to eternity (Habakkuk 2:14).
The kings of the earth will not usher in a reign of peace; it will be the Prince of Peace who subdues these warring nations who will then begin this millennium of peace. Wilbur M. Smith