Opposition was not successful under Stalin. He was sometimes referred to as a ‘grey blur’ and was underestimated by any political opposition. Trotsky, Kamenev, Zinoviev and Bukharin were all sidelined, discredited, expelled, isolated, accused of treachery and eradicated by 1940
Mass purges of party membership followed the removal of high ranking political rivals.
All radical plans implemented with no significant compromise regardless of opposition