My background is in complex systems physics. Surprisingly, a lot of the work in this area (and most of my own work) revolves around using graph theory and data science to study problems in fields, ranging from epidemiology, linguistics, social and political science, information diffusion, social interactions, etc.

Earlier this year I started a substack where I work through some of the ideas and algorithms using real world datasets: http://graphs4sci.substack.com/