A submissive sheep is a find for a wolf

Here is a passage from The Gulag Archipelago by Aleksandr Solzhenitsyn:

For several decades political arrests were distinguished in our country precisely by the fact that people were arrested who were guilty of nothing and were therefore unprepared to put up any resistance whatsoever. There was a general feeling of being destined for destruction, a sense of having nowhere to escape from the GPU-NKVD (which, incidentally, given our internal passport system, was quite accurate). And even in the fever of epidemic arrests, when people leaving for work said farewell to their families every day, because they could not be certain they would return at night, even then almost no one tried to run away and only in rare cases did people commit suicide. And that was exactly what was required. A submissive sheep is a find for a wolf.

We're nearly there again.