This book is devoted to the contemporary political protest in Russia, mainly the two waves of this protest in 2011-2012 and 2017-2021, which became the most massive since the 1990s; organizationally framed against the current government, uniting representatives of various ideological and political views in their ranks. This study analyses existing sociological measurements and performs a comparative analysis of the composition of participants by age, gender, education and property, by belonging to large social groups, by political beliefs and preferences, and sympathy for political and protest leaders; sociological measurements of the socio-psychological state of Russians, worrying questions