Abstract
The article is devoted to the description and classification of causes for the emergence and increase of social movements in the context of the spread of internet networks. The article identified five groups of causes for emergence and development of social movements at three levels of social studies. The author identifies functional causes at the macrolevel of analysis, structural and spaсe conditions that provide a field of opportunities for protest activity, and psychological and ideological reasons that motivate participants of social movements at the microlevel. The article divides the highlighted causes into five themes, each of which correlates to relevant classical scholars of the XIX century: a) Durkheim's theme - communicative space; b) Tonnies' theme - mental motivation; c) Marx's theme - "objective” structural strain in society; d) Weber's theme - changing the structure of political opportunities; e) the theme of Saint-Simon and Comte - ideological motivation. The article describes the reasons for emergence and growth of social movements and cites classical studies of social movements and modern Internet Studies, in which these reasons were described. The designated themes are a coordinate grid that allows researchers to determine the causes of emergence and development of social movements. In particular social movements, one or more causes may prevail or, on the contrary, exert a comparatively minor influence. Nevertheless, none of the groups of causes, taken separately, are a sufficient basis for the growth of social movements and protest activity, therefore, each reason must be considered in the study of social movements.