Hi Robin,
Thanks for the inquiry! As you may recall, you and I discussed these very issues at my birthday party. I appreciated you bringing up then the activities of the traditional fields of economics/history/political science/etc., because it led me to further consider them and advance my thinking. Accordingly, these fields are addressed in the essay, under the section heading "Sub-Civilizations". The text is:
The most obvious reservoirs of surrogate systems are from such fields as political science and economics, which specifically study the behavior of human systems. These fields have the advantage of working with empirical systems. Data collection has historically been difficult, but is getting increasingly easier. Most of this research, however, has examined individual countries or markets within global civilization, and does not explicitly study the behavior of civilization as a whole. For some features, this distinction does not matter; a global society functions much like a smaller one. Frequently, however, "more is different" (Anderson 1972). Large aggregates of states do indeed have different dynamics from those of smaller polities (e.g. the United Kingdom is not simply a large London). This is evidence that the larger global system is functionally distinct from its smaller subsystems, just like the human body is functionally distinct from its smaller cells. We must recognize dynamics that are the same on the global level as on the smaller level and use the knowledge gained from studying individual countries and markets. But we must also recognize which features are different, and explicitly study the behavior of human civilization as a whole.
That single paragraph obviously does not close the book on how existing research directions should be incorporated and leveraged for improving civilization as a whole, but it does highlight how they are not necessarily focused on the suggested task (improving how the complete system of humanity steers itself).