If I had the power to change things, the first thing would be to fix the Y2K problem. It will cause all economy to crash. If it is fixed bank accounts, airports, all commerce, and people will be safe.
I would then change the life of the cults. I would break the cults. Many would then not commit suicide. I would save lots of people from riots, skirmishes, and wars.
I would make everyone able to watch the Olympics at Sydney, Australia. I would protect Sydney so that there would be no bombing. Everyone would have free food.
The world would be a good place if I could change things.
Everyone would be happy.