Difficult Terms and Concepts in The Second Sex

From this Wikipedia article:

"Alienation" refers to a theory formed by Karl Marx regarding the separation of a person from some crucial aspect of his "species-essence" or humanity.

"“The alienation of the worker in his product means not only that his labor becomes an object, an external existence, but that it exists outside him, as a hostile and foreign power.”

de Beauvoir appropriates this term to describe the way that man alienates himself in private property. The fruit of his labor is outside of himself; he identifies with the fruit of his labor in order to better understand his place in the world. According to de Beauvoir, early man alienated himself not only in nature but also in women; land and women become private property, and it is this that will determine women's roles in societies going forward.