Wikipedia (it):

"The term nexialism was introduced in science fiction by Alfred Elton van Vogt, a canadian writer, in a series of tales gathered together in the book The Voyage of the Space Beagle, to describe a fictional doctrine. Van Vogt's theory assumes: since each discipline reached the highest specialization levels, a new science was needed to re-establish the connections between the various competences and knowledges. Who performs this task is defined nexialist."

Moreover:
"In an attempt to explain a new learning modality, based on network paradigm, a new learning theory in the digital era emerged lately, named nexialism.

…

A peculiar aspect of nexialism is the use of the network with nodes and connections as the central metaphor to explain how learning process occurs. In this metaphor, a node is whatever may be connected to another node: informations, datas, images, feelings. To learn is a connections-creating process and develops a network."

This last theory of them I like, since it's analog to the structure that in man performs that function: the brain (network made of neurons and synapsis… if you want to take a deeper look on the subject: Neural networks)