It was Lenin.
It cannot be Stalin, because Lenin is his predecessor and it is with Lenin that the central planning and communism was introduced to what was then Russia.
Karl Marx and Engels created together communism, but didn't introduce it specifically to Russia. They wrote their ideas and they spread all around the world and Lenin was inspired by them.
The Stone Age is divided in three distinct periods: the Paleolithic Period or Old Stone Age (30,000 BCE–10,000 BCE), the Mesolithic Period or Middle Stone Age (10,000 BCE–8,000 BCE), and the Neolithic Period or New Stone Age (8,000 BCE–3,000 BCE).
The deepest hole in the world is
Kole Superdeep Borehole
<em>It is at 9 inches in diameter, but at 40,230 feet (12,262 meters) reigns as the deepest hole.</em>
