The list of forums is partly (and rightly) hierarchical: metaphysics and epistemology, ethics, politics, and aesthetics.
Why is the History subforum listed under Political Philosophy? History (as a discipline of study) is a specialized science just as physics, economics, and psychology are. I recommend rewriting the description of the science section to essentialize it:
Specialized Sciences
Studies (and associated technologies) based on general philosophy but having specialized methods and objects of inquiry – for example, physics, biology, psychology, history, economics, and computer science.
With this approach, History, as a science, does not need its own subforum (which has attracted little traffic, anyway) any more than physics and psychology do – thus simplifying the list.
Likewise, the Psychology and Self-Improvement forum could be simply Self-Improvement. Psychology as a science belongs rightly under Specialized Sciences.