Russia Under the Bolshevik Regime by Richard Pipes
The third book in the Russia series. More history than the Old Regime, more study of society than Revolution. Covers the period from the Civil Wars to the death of Lenin. The problem of culture -- the "proletarian" writers who actively suppressed all others in the name of Revolution and produced no work that survives. The anti-religious movement -- the confiscation of consecrated vessels from the Russian Orthodox Church on the pretext of feeding the hungry -- the Jewish Communists attacking Judaism with particular fervor, such that non-Jewish Communists were told to emulate them in attack Christianity (without the desired effect of making the Orthodox think that they were not particularly anti-Orthodox). Famine. Comparisons with Fascism and Nazism. And more.
No half-heartedness and no worldly fear must turn us aside from following the light unflinchingly.