The modern world or the new age world is a world which was built on power and control by it, its the present world.

Power is the main thing that's changing the world since it inception, prolly ain't controlling as it does now. Power comes in different forms(money, positions, fame, etc)

Power is Holding a fear of something in your mind and making it known, power is also the agreement and acceptance of the majority.

How does it change the world???

I think the impact of power in changing the world is so substantial to an inestimable point