This chapter describes the study’s research design. Protest event data from the three contexts over three decades, gathered with an intensive data collection strategy, was aggregated into a dataset of forty large far-right demonstration campaigns. The chapter describes the application of qualitative comparative analysis (QCA) and process-tracing techniques to detect patterns of causal conditions and then to evaluate rigorously the processual causation underlying those patterns. In social movement research and scholarship on the far right, single-case studies abound, providing rich qualitative depth but limited generalisability. At the same time, large-N quantitative research often lacks that depth of information that enables robust causal inferences. The main thrust of the research design applied here is overcoming these deficiencies.