There are many ways. First is understanding human nature. Greed, ambition and politics are part of the human psyche. One of the best ways is to take control of it. I would recommend the teachings of Neville Goddard. It is too detailed to include it here. The essence of it is you have the power to change anybody or any situation to whatever you want it to be. You do it remotely, unseen, within your own consciousness, not directly. Then everything changes.