Political Polarization and Democratic Resilience in the Digital Age: A Systematic Literature Review
DOI:
https://doi.org/10.53905/Veritas.v1i04.14Keywords:
political polarization, democratic resilience, echo chambers, misinformation, social media algorithms, digital democracyAbstract
Purpose of the study: This systematic literature review (SLR) synthesizes recent scholarship on how digital platforms have reshaped political polarization and, in turn, democratic resilience. The review addresses four research questions: (1) how digital platforms have transformed polarization in contemporary democracies; (2) which mechanisms — algorithmic curation, misinformation, and echo chambers — explain platforms' influence on democratic resilience; (3) which mitigation strategies have been proposed or tested to strengthen resilience; and (4) what gaps remain for future research.
Methodology: Following PRISMA 2020 reporting guidance, a structured search was conducted across indexed academic repositories (arXiv, Nature Portfolio journals, Cambridge Core, Frontiers, Semantic Scholar, ResearchGate) and institutional/policy sources (OECD, the European Commission Joint Research Centre, AlgorithmWatch) using combinations of the terms "political polarization," "echo chamber," "misinformation," "democratic resilience," and "platform governance." Thirty-three records were identified; after removing duplicates and screening for topical and analytical relevance, twenty-two studies (2020–2026) were retained for narrative synthesis, spanning systematic reviews, empirical (survey, experimental, and computational) studies, and policy analyses.
Results: Included studies converge on three points: (a) algorithmic recommendation systems and engagement-optimized design amplify affectively charged and identity-based content more consistently than they create strict informational "filter bubbles"; (b) evidence for the classic echo-chamber hypothesis is heterogeneous and method-dependent, with computational trace-data studies more often supporting it than survey-based studies; and (c) mitigation strategies cluster into platform-design interventions (recommender adjustability, transparency), regulatory approaches (e.g., the EU Digital Services Act), and civic/media-literacy interventions, with cross-national and non-Western evidence remaining scarce.
Conclusions: Digital platforms are neither the sole nor a uniform cause of democratic backsliding, but they interact with pre-existing societal cleavages and weak institutional guardrails to erode democratic resilience, particularly through affective rather than purely issue-based polarization. Multi-level interventions combining platform accountability, regulatory oversight, and civic resilience-building appear more promising than single-lever solutions. Future research should prioritize cross-national, cross-platform, and causally identified designs beyond the current US/EU-centric evidence base.
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