What is the term used for the time in Russian history when Josef Stalin forced his ideas of communism and totalitarian control through a series of mass killings and exiling of enemies to labor camps

Great purge

Explanation:

The great purge started in the 1930s and ended when Stalin died. this is what the term is called. there was a different one though In 1923 but that one was before Josef Stalin came to power.

john maynard keynes developed new economic theories in response to the stock market crash of 1929. great depression of the 1930s. first and second world wars. economic boom of the 1950s.

your answer would be (b)