Abstract
There are different ways of defining science, but I should like to examine it primarily as one of the forms of mental labor. In this connection it is appropriate to recall Marx's words: "A distinction must be made between universal labor and cooperative labor. Each plays its own role in the process of production. They overlap, but there is also a distinction between them. Every scientific work, every discovery, every invention is universal labor. It is made possible partly by cooperation among contemporaries and partly by making use of the work of those who have gone before. Joint labor presumes direct cooperation among individuals." What is subsumed here under "cooperative labor," according to Marx, is "directly associated labor," which, to put it in other terms, is "direct labor."