You might want to think about the various historical allusions that the text gives us, especially in Chapter Nine, which narrates how Locke and Demosthenes were created. Consider how Peter tries to persuade his sister, Val, to join with him in a plan to try and control the course of earth at this vital juncture in the plant's history:
This is what historians usually do, quibble about cause and effect when the point is, there are times when the world is in flux and the right voice in the right place can move the world. Thomas Paine and Ben Franklin, for instance. Bismarck. Lenin.
Peter here therefore makes a number of historical allusions to various characters who, in world history, were voices who were "in the right place," and through speaking up were able to "move the world." You might like to research into each of these figures and consider if Peter's assessment of them is correct. Lenin, for example, is famed for his role in leading the Soviet Union on its Communist path to greatness against the USA. Thomas Paine was one of the founding fathers of the USA. Each of these figures, in its own way, was an example of what Peter hopes he and Val can be for their own context now.