By the late 1920s stalin was the unchallenged leader of the soviet union
true or false

The answer is:

True.

He was a Russian communist revolutionary and from the late 1920s was the dictatorial leader of the Soviet Union.

leonardo was the supreme renaissance painter, scientist, inventor, and polymath. da vinci is widely regarded as one of the greatest minds the world has ever produced. he was interested in everything from music to art and science. da vinci was an immense creative force at the start of the renaissance period. amongst his many works was the immortal painting – the mona lisa.

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