In Chapter 9 of Ender's Game, how does Peter plan to take over the world?
Peter plans to have Valentine ask their father to get him citizen's access to the nets, instead of student access. By spreading his ideas on the nets, Peter wants to establish a kind of Pax Americana, or era of American peace, so that if the Buggers arrive to defeat the people on earth, the earth will already be at peace with itself and will be impossible to defeat.
Once their father allows them to have adult access on the nets, Peter and Valentine read, under false names, the debates going on. Then, they begin posting their comments on the debates and learning how to refine their arguments. People begin commenting on the points they are bringing up in their writing. Valentine, writing under the pseudonym Demosthenes, eventually receives an offer to write for a weekly newsnet. Peter, writing as Locke, calls for an anti-Warsaw strategy that capitalizes on people's fears. They both start writing regular newsnets, and their parents even read their writings, not recognizing that their children wrote them.
Peter plans on taking over the world with the help of Valentine. Together they begin posting articles on the nets to influence public opinion of the war with the Russians; they do so anonymously and under the pen names Demosthenes and Locke. As Locke, Peter poses as the moderate voice of reason, and Valentine as Demosthenes takes a more incendiary view of how to approach the building conflict with the Russians. The two plan their articles and help each other capture the voice of their different personas. Both Peter and Valentine are motivated by the potential to influence the adult sphere as young people.