Originally Posted by Cherry7

Marx made no attempts to create a plan for socialism or communism beyond principles.

The communist manifesto is an analysis of capitalism and explaining that history can be seen as a history of class struggle.

Marx believed that the structures created in the struggle to overthrow capitalism would be the foundations of the new society.

The Soviets on taking power had no blueprints, in fact their five year plans were based on the German command economic plans used in WW1.