The intersection of meaningful specialised knowledge creates meta-knowledges that can propel human praxis in a positive direction.
This is the reason to study multiple academic disciplines – to refine meta-knowledges which guide human praxis.
The polymath thus has more relevant knowledge at their disposal.
For example, the knowledge of cosmologists that the universe is entropic means that all genetic lines are doomed and thus continuation of one’s genetic line is not ‘the telos’ or sole purpose of life.
Other corollaries or intersectional knowledge is the political knowledge that we should work less and that the vast majority of humans are over-worked, considering that in the ‘hunter-gatherer’period humans worked 15-20 hours a week. So this evolutionary insight forms a basis for understanding of some of our psychological and political needs. However, we should grasp nuance concerning this, that human needs are evolving and there is now more of a demand for sedentary cognitive labour, and that we can do more if it without becoming as tired.
Very pressing is the intersectionality of optimum human population. This requires social science understandings of basic needs of humans within civilization, and resource studies in the realm of water, precious metals, wood, plastics and electricity, minimising environmental externalities whilst reproducing complex social needs.
Intersectionality of relevant knowledge-sets is needed for genuine, holistic, and comprehensive problem-solving in society, and thus we must incentivise multi-disciplinarian scholarship on all types of human inquiry. Thus consilience is achieved, maintained and furthered!
Henry Willoughby's Social Justice Blog 