Individuals have to protect themselves against communication. Mass education teaches how to navigate in a sea of knowledge. It is therefore at stake during battle. The object of ownership, it is passed on to descendants. The feudal hierarchy, a military caste, is the protector of the land, autarchic guarantor of security.
Survival depends on production, supplies and outlets.
This sphere is unstable. One has to be active to maintain one's position. The resource base which ensures survival is personal know-how. It can be concerned with leading-edge, sophisticated technology or on the contrary go back to an ancestral knowledge, such as the art of surviving amidst ice floes or in the desert. It requires many years to acquire it, there is constant risk of obsolescence and, unlike the former heritage, it can only be transmitted through effort.