The fourth beast is a fourth kingdom that will appear on earth

Daniel 7:15-28

The four great beasts are four kings that will rise from the earth. But the holy people of the Most High will receive the kingdom and will possess it forever—yes, for ever and ever.’

Then I wanted to know the meaning of the fourth beast, which was different from all the others and most terrifying, with its iron teeth and bronze claws—the beast that crushed and devoured its victims and trampled underfoot whatever was left.

before which three of them fell—the horn that looked more imposing than the others and that had eyes and a mouth that spoke boastfully. As I watched, this horn was waging war against the holy people and defeating them, until the Ancient of Days came and pronounced judgment in favor of the holy people of the Most High, and the time came when they possessed the kingdom.

He gave me this explanation: ‘The fourth beast is a fourth kingdom that will appear on earth. It will be different from all the other kingdoms and will devour the whole earth, trampling it down and crushing it. The ten horns are ten kings who will come from this kingdom. After them another king will arise, different from the earlier ones; he will subdue three kings. He will speak against the Most High and oppress his holy people and try to change the set times and the laws. The holy people will be delivered into his hands for a time, times and half a time.

But the court will sit, and his power will be taken away and completely destroyed forever. Then the sovereignty, power and greatness of all the kingdoms under heaven will be handed over to the holy people of the Most High. His kingdom will be an everlasting kingdom, and all rulers will worship and obey him.

Opposing God's people in different guises throughout history is the  'little horn', until God finally removes its power. It is from this chapter that Revelation13 draws its imagery.

Why?

All of the kingdoms in the world are temporary and devouring people.

Don't anticipate anything from the governor in the world, even in the least county the leader is speaking boastfully. He does not care about the power of the Lord, he oppresses the follower of the Lord.

The good news is God's kingdom will come and the Mose High will judge all of them. The holy people will be delivered into the evil for a while.

How?

Our hope is in the hands of the Lord, obey the word of the Lord and trust in Him like Daniel.