• Structural and contextual determinants consistently shape civic engagement: economic development, neighborhood context, and broader social structures condition who participates and how participation accumulates across societies [9], [13], [6], [8], [7].

• Psychological empowerment, perceived control, sense of community, and group consciousness emerge as proximal drivers of participation, linking individual psychology with collective action [19], [5], [10], [20].

• Social capital and voluntary associations underpin mobilization and perceived legitimacy of collective action, with declines in social connectedness shaping activism and participation [3], [4], [2].

• Theoretical and methodological diversity frames participation through resource mobilization, social psychology, and rational choice lenses, enabling cross-cutting explanations of turnout and protest [14], [11], [15], [16].

• Cross-national comparisons and policy-oriented designs highlight how culture, institutions, and participatory structures shape citizen engagement, informing panel-based policy formation [7], [17], [18].