Stalin certainly achieved his purpose of establishing 'Socialism in One Country', and thereby completed the Bolshevik Revolution in Russia. Is this a correct judgement?

Stalin believed that the Russian's could build a Communist state in the USSR without the help of foreign countries. He called this policy 'Socialism in One Country'. In the period of 1928 to 1932, Stalin's most significant step towards 'Socialism in One Country' was the introduction of the first of the three five-year Plans. In 1928 Russia was still an industrially limited country. It produced less industrial goods than many smaller countries. Through rapid industrialization and collectivization of …

…in Soviet society in the years 1928 to 1932 revealed that Stalin achieved his purpose of establishing 'Socialism in One Country', and thereby completed the Bolshevik Revolution in Russia. The five-year plan allowed rapid industrialization and collectivization of agriculture. Stalin was able to erase all traces of the capitalism that had entered under the New Economic Policy, and transform the Soviet Union as quickly as possible, without regard to cost, into an industrialized and completely socialist state.