[2] Rosa is referring to the terror and stifling of democracy, in particular the arrest and execution of hundreds of Left SRs as ???sacrifices to atone??? for the attempted coup against Soviet power that began with the murder of the German ambassador, Wilhelm Graf von Mirbach-Harff (6.7.1918) in Moscow. (See Rosa Luxemburg, On the Russian Revolution, Gesammelte Werke, Vol.4, Berlin 1990; Rosa Luxe