Psalm 46:9 KJB
God protects the entire human race from utter destruction. God uses His fiery wrath against evil to bring wars to an end all over the earth. God causes wars to cease because He makes humans to become sick and tired of death and destruction. The Devil causes wars because he injects spiritual death into the inner beings of all humans because they all sin. Genesis 2:17; Genesis 3:15 (KJB). Spiritual death can cause humans to become evil and gain a desire to obtain control over others even if by force. James 4:1-2 (KJB). War happens to be another example of how the Devil desires to utterly destroy the entire human race because God creates it and loves it. War and all evil happen to be a manifestation of the Devil's hatred of the human race. If the Devil had his way, wars would continue all over the earth until humanity became annihilated.
God creates humans to be good and creative. Genesis 1:31; Genesis 1:26-27 (KJB). God influences the good natures of humans to make wars to cease. Most humans try to be good because of God's influence in their souls and spirits. But evil humans sometimes gain control over a country, and they, and their evil gang, force even the good people of their country to go to war. This fact provides an example of how good people, who are sinful themselves, never possess enough strength to overcome evil. No doubt, the Devil became glad when nuclear weapons were invented. He thought they would wipe out the human race. But every time nuclear weapons became in danger of being used, humans backed off from using them because their good natures let them know that their use would probably annihilate the human race.
The Devil injects spiritual death into every human who sins because when they die, he hopes that their souls and spirits that God created will be trapped within the regions of death forever, and God will forever lose to the Devil a part of His creation. God allows the Devil to do his worst to humanity, including causing wars, to prove that His Love for His creations and His protection of them can never be destroyed. Job 1:11-12; Job 2:5-6; Job 2:9-10; I Corinthians 13:8; Psalm 36:6 (KJB). God knows exactly how to renew the faith that He puts into every human that He creates. Job 1:21 (KJB). Humans are far too weak to overcome spiritual death and the Devil, but God's Almighty Love and Power have already completely defeated the Devil and all evil. Christ took all of the sins, evil, and spiritual deaths of all humans on Himself on a cruel cross, and He rose from the dead having gained a complete and absolute victory over the Devil and all evil. Hebrews 2:9-18; Revelation 1:17-18; I John 3:8 (KJB). Christ paid the eternal penalty for sins and evil, and He turned eternal spiritual death into only a temporary death for all of His living humans. II Timothy 1:10; I Corinthians 15:20-28; I John 2:2; I Timothy 4:10 (KJB). Christ judged only the Devil and all evil when He suffered and died on the cross. John 12:31-32 (KJB).
The Holy Spirit must and will return all of His living humans to the faith that He puts into them when He creates them. Habakkuk 2:4; Romans 1:17 (KJB). In this Church Age, the Holy Spirit saves His living humans by His grace when He causes them to hear the gospel and repent and believe that Christ shed His blood on the cross to wash away their sins and evil, and He gives them the righteousness of Christ Himself so that they can be accepted by God to live with Him in Heaven forever. Matthew 26:28; John 5:24; Revelation 1:5; II Corinthians 5:21; John 17:23-24 (KJB). In the end of the world, Christ will visit all of His living humans on the earth and confined to the regions of death, and when they all see His Majesty and His Almighty Love for them, they will all repent and return to the faith that Christ put into them when He created them that He is their Savior. Revelation 5:11-14; Philippians 2:9-11 (KJB). Christ will then be able to use His fiery wrath against evil to dissolve their beings to separate their repentant, living natures for Him to recreate to live forever on His recreated earth, and He will cast their dead and evil natures into the eternal lake of fire. Psalm 75:3; Matthew 13:36-43; II Peter 3:9-13; Luke 3:16-17; Revelation 20:11-15; Revelation 21:1-5; Revelation 22:11-12 (KJB).