FWIW, Robert Service concludes in his biography of Trotsky that many similar policies would have been implemented concerning the economy and such, but that the USSR would have dodged the megalomaniacal killing sprees and state terror that characterized Stalin's reign. After all, Stalin adopted the policies promoted by most of his opponents, including Trotsky, once he had successfully eliminated them or removed them from power and respectability.
How respectable a writer is Service? What should I buy, avoid, look out for?