This document discusses using digital traces and social science methods to study complex issues. It provides three examples: 1) Mapping climate change negotiations to analyze topics, countries and the shift to adaptation; 2) Analyzing connections between far-right groups in Europe using their online networks; 3) Studying discussion of health worker migration by mapping actors in different sectors. The document also outlines digital tools for data collection and network analysis that could benefit journalism through techniques like identifying themes, actors, partisan sources and hyperlink associations.