Being president of the USA is the most important job in the world, bar none. No other position of power compares in terms of the consequences for everyone and everything on planet Earth. The occupant can have a profound effect on our security, health, environment, living standards and even the progress of humanity. The Iran war is the most current example of that. Thousands have already died, or been badly injured. Infrastructure is being destroyed daily, people in the region are suffering displacement and terror, economies across the globe are grinding to a halt, oil supplies are struggling, and the price has doubled in the past five weeks.