Graphs in the world: Modeling systems as networks

i never understand these kind of questions. why do you need to general taxonomy once you know the specifics?

Interdisciplinary. It's an application of mathematics to other fields. Which may, in turn, feed back into mathematics as new concepts and structures are revealed.

Author here. I'd say this all falls under SNA (Social Network Analysis).

From https://en.wikipedia.org/wiki/Social_network_analysis:

Social network analysis (SNA) is the process of investigating social structures through the use of network and graph theories.

I see this is the perfect example of the cross disciplinary nature of data science.

I do graph work, and I find myself regularly reading papers in math, epidemiology, computational social science and natural language processing. Often the problems are almost exactly the same, and approaches are very similar.