if you had the ability to cause major change in the world, what would you change and why?

If you had the ability to cause major change in the world, what would you change and why?

If i had the ability to cause major change in the world, i would like to bring peace to the world. A world with no war,no deformity people, and a world filled with beautiful forest and mysterious places. there would be joy everywhere. no animal, human abuse. just peace..... :)