Circumstantial pressure, [33], [64], [77]

Civic authority, vide [municipal control]

Civic improvement, [22], [77], [105], [108], [129], [130], [140]

Civilization, [31], [49]

Classes, social, [96], [139]

Clergy, [74], [83], [84], [139]

Clinics, [134]

Climatic factors in society, [66], [67], [142]

Clubs, [76], [123]

Collective behavior, vide [behavior]