I don't think you should understate your case Martin.

Marx got seriously into class.

The fuedal aristocracy owned the land and all the power that went with it. The major means of production was agriculture.

In industrial society, the capitalists own the factories etc and all the power that implies. The major means of production is industrial.

If a socialist society is possible, where power and wealth would be shared more equaly, what will be the major means of production?