Originally Posted by Spartacuss
Agreed. The reality of the Winter War against Finland shows the damage of Stalin's Great Purge.
And they undid all of that damage in the the space of two or three years? No. They didn't need to.
The German war effort was partly based on Soviet raw materials that they'd bought. If they'd gone in earlier, they'd have had nothing to run their tanks on.
I'm not arguing that the Soviet Union was in a position to invade or conquer central or western Europe in 1941, but it was strong enough and well enough stocked with people and raw materials to have survived. As it did.