@HexHammer,
You are definitely right.
Marx poorly represented what would follow capitalism.
However, he was convinced that this will be a society with enlarged possibilities. He demonstrated this by the fact that each successive stage of development of the society gave a person more freedom. To achieve the next level, he proposed abolishing private property. And it was the largest of its mistake.
He believed that to improve the welfare of sufficient scientific ideology in a fair state. And significant part of people believed him.
And for 4000 years in past the ancient magicians, the scientists of primitive society had offered to build Stonehenge for a better life too. And they also were believed.
Primitive people were ruled by "intellectual relations of production".
It force people to work "for a bare idea".
People used to believe intellectuals. Intellectuals have the knowledge, able to defeat the disease and help in distress.
Marx did not pay much attention to such ancient forms of production relations as "intelligency's". And the people to build socialism has lifted the ancient relations of production more high than the most recent relations.
But it was a hindrance to the development of well-being. Thus the overall law of Marx concerning the inhibitory effect of outdate relations of production onto the basis of economic has been confirmed in reality once more!