These reactionaries preserved their moral purity (as reactionaries so often do) by not reading, so they didn’t have to see that Soviet writers had been using science fiction for years to write with at least relative freedom from Party ideology about politics, society, and the future of mankind.

Ursula K Le Guin introducing Arkady Strugatsky & Boris Strugatsky, Roadside Picnic [Amazon, Bookshop, Publisher, Local Library]