Im writing a book about world wide domination with the premise that someone has the possibility to beam anything they want to into the minds of the whole planet. Im looking for ideas on what you could do with this power such as brainwashing the public, marketing massive corporate empires, influencing politics, spreading religious ideals, destroying the planet, or creating a great social utopian world, or any other crazy thing. I was wondering what you thought would be cool do if you could shape the mindstate of the world.

For domination what you might think of doing is have this someone invent a nanobot. And spread it like a virus in some fashion. Everyone infected can be taken over by it with this person running the show. And you could throw a twist in there. Like having the person discover that the peoples are already infected with a different nano. So rather then domonate its now his/her job to rescue the world and both sides end up using their respective powers to fight when detected.