To know is to compare : studying social media across nations media and platforms Nations media and platforms Part 1. Foundations Cross national and regional comparisons Cross media comparisons Cross platform comparisons Part 2. Pathways Histories Languages Blurred genres trading zones and heterogeneous inquiries. How systematic comparative research can unlock the potential of social media scholarship. Though diverse and fruitful social media scholarship too often focuses on single platforms in single countries disconnected from other media that people use. Mora Matassi and Pablo J. Boczkowskis alternative approach offers a framework based on the epistemological principle that everything we know emerges from comparing two or more entities. Drawing on a wealth of real life cases Matassi and Boczkowski examine key aspects of social media from three comparative dimensions (nations media and platforms) and two topics (history and language) to propose a blueprint that encourages researchers and lay readers alike to think about social media from new perspectives. Matassi and Boczkowski illustrate their theoretical points with examples that link multiple media illuminate an array of platforms cover different countries and eras and address various languages and both textual and non textual signifiers. The result is an original conceptual account that allows for the study of social media in ways that are global de westernized transmedia and multiplatform. In addition the authors review the major texts that use a comparative treatment and suggest topics theories and methods for engaging in comparative studies in the future.