There is no proof of any "one world government" in the works. Nations are still in conflict with each other; they always have been and are continuing.
During the time of the son of perdition taking his seat in Jerusalem, 2 Thessalonians 2:1-12, the whole world will have fallen into total chaos from all the destruction here on earth of God's great wrath during the first six trumpets sounding that will have destroyed much of the worlds resources. Many will be looking for a savior type to save them and their families and provide safety, provision and shelter and this is what the beast out of the earth ( Luciferian one world government that is even now working in secret) with all deceitfulness will promise if all will bow down and receive this mans mark, 1 Thessalonians 5:1-6, Rev 13:18. When this fourth kingdom is destroyed the people of the earth that are none of Christ's and have taken the mark of this beast will bewail her destruction, Rev 18.
The NWO will come to fruition at the sounding of the seventh trumpet as it is the fourth beast that will be a revived fourth kingdom that will devour the whole world and break it in pieces as all will be made to bow down and worship this beast out of the earth and forced to take it's mark. This is the same beast that came against Shadrach, Meshach, and Abednego in Daniel Chapter 3 that tried to force them to bow down and worship the image of the beast. And he (the son of perdition who comes out of this fourth kingdom) shall speak great words against the most High, and shall wear out (oppress) the saints of the most High, and think to change times and laws and they shall be given into his hand until a time and times and the dividing of time, (3 1/2 years), Daniel chapter 3, 7; 2 Thessalonians 2:1-12; Rev 13. Those that take the mark will have sealed their fate as their names are not found written in the Lamb's Book of Life as when judgment comes they will be cast into the lake of fire. Rev 20; 14:12-20. Many who have great faith and patience will be beheaded for not bowing down to worship this beast and take its mark if they did not heed the warning Jesus gave in Matthew 24:15-18.
This will be a time of a great faith and patience in Christ as we trust Him to take care of our needs during this time of the end of days and also what happens to those who take the mark of this man.
Matthew 6:25 Therefore I say unto you, Take no thought for your life, what ye shall eat, or what ye shall drink; nor yet for your body, what ye shall put on. Is not the life more than meat, and the body than raiment? 26 Behold the fowls of the air: for they sow not, neither do they reap, nor gather into barns; yet your heavenly Father feedeth them. Are ye not much better than they? 27 Which of you by taking thought can add one cubit unto his stature? 28 And why take ye thought for raiment? Consider the lilies of the field, how they grow; they toil not, neither do they spin: 29 And yet I say unto you, That even Solomon in all his glory was not arrayed like one of these. 30 Wherefore, if God so clothe the grass of the field, which to day is, and to morrow is cast into the oven, shall he not much more clothe you, O ye of little faith?
Rev 14: 9 And the third angel followed them, saying with a loud voice, If any man worship the beast and his image, and receive his mark in his forehead, or in his hand, 10 The same shall drink of the wine of the wrath of God, which is poured out without mixture into the cup of his indignation; and he shall be tormented with fire and brimstone in the presence of the holy angels, and in the presence of the Lamb: 11 And the smoke of their torment ascendeth up for ever and ever: and they have no rest day nor night, who worship the beast and his image, and whosoever receiveth the mark of his name. 12 Here is the patience of the saints: here are they that keep the commandments of God, and the faith of Jesus.