Kill 7 people within 7 days and you rule the world. Do you accept the challenge?

It doesn't matter who you kill, how you kill them, or if you get caught, as long as you are directly responsible for their deaths, you get to rule the world. You can force anyone to do whatever you want, you could solve world hunger or stop climate change (if you're smart enough), or just force everyone to give you anything you want. But, if you get caught and you can't kill anymore, you have to live with the consequences.

Do you accept the challenge?