"He shall judge between the nations, and shall decide disputes for many peoples; and 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."
Part of the purpose of the United Nations is to help member nations resolve disputes by negotiation, and without resorting to armed conflict.
I wonder if Evgeniy Vuchetich, the artist who created this sculpture, understood the context of the passage he used in it? If he did, he would understand that it is a prophetic passage. It describes what God will do himself at the end of history. God will bring peace and justice to the earth. He won't need any help from the United Nations, or any other human institution, for that matter.