When we think about the nations, we see what the Prophets have prophesied. If we Look in the book of Daniel, the Angel Gabriel gave him a detailed account of the nations as they relate to his people and what would befall them. Gabriel was very specific; going as far as to share the events on there succession . Starting in the 10th chapter of Daniel
Daniel 10:1
In the third year of Cyrus king of Persia a message was revealed to Daniel, whose name was called Belteshazzar. The message was true, but the appointed time was long; and he understood the message, and had understanding of the vision.
We Also see the Apostle John who had prophetic insight, on the Isle of Patmos receive confirmation of what had been declared to Daniel and further Revelation as to what would befall the nations as they affect his people and the church.
As you read through history books,l every word progressively has been coming to pass.
Were these Prophets able to change the things that would befall the nations? Not directly, but indirectly, because of their love for God, we have perfect insight as to what will befall all men. Also because of their obedience God had a pure voice to give men warning to amend their ways.
Some things are unchangeable at this point, however would you be that pure voice to lead men and women to Christ? This could help them change their destiny, if they are willing.
Revelation 10:5-7
5 And the angel which I saw stand upon the sea and upon the earth lifted up his hand to heaven, 6 And sware by him that liveth for ever and ever, who created heaven, and the things that therein are, and the earth, and the things that therein are, and the sea, and the things which are therein, that there should be time no longer: 7 But in the days of the voice of the seventh angel, when he shall begin to sound, the mystery of God should be finished, as he hath declared to his servants the prophets.