The pantayo perspective was developed from my analysis of the fundamental historical perspectives that arose in the process of Philippine nationhood. The essence of this perspective was already an important basis of my course in historiography from the early 1970s, in which the methodology, philosophy and techniques of writing history were studied. The core of the pantayo perspective lies in the internal interrelationships and the inter-relating of the characteristics, values, knowledges, aims, customs, behaviours and experiences of a cultural whole. It refers to a "mentality" that a foreigner who has not yet entered a society and culture possessed of a pantayo perspective will find difficult to understand. It is this pantayo perspective that forms the basis of the P/Filipinizatian of the sciences.