A group of moderates associated with Sergei Kirov, head of the Communist Party in Leningrad, were able to force some changes in policy in the early 1930s
Senior figures within government were aware of the problems with Stalin's industrial and agricultural policies, which undermined Stalin's authority in government
Stalin could blame workers and managers for the problems by accusing them of being wreckers and saboteurs
Stalin used wreckers and saboteurs as an army of slave labour in Gulags to build factories or mine resources
95% of those affected by the Great Terror were men between the ages of 30 and 45 who held senior positions in the Party or an important role in the economy