Einstein in Sweezy's Mag

Albert Einstein had an article in the inaugural issue of Monthly Review. I don't know if there is a story here. Did Paul Sweezy, the publisher of the magazine ask Einstein for this article? Did Einstein merely answer a call for papers?

When I first found out about existence of this article, I expected Einstein to merely put forward comments about how we should all try to get along. (I'm never quite sure if I understand the word "Bien-pensant". I know enough French to translate it, but I think I've stumbled on the concept here.) But when I read Einstein's article I found out that he accepts Marx as having made scientific claims:

"The owner of the means of the means of production is in a position to purchase the labor power of the worker. By using the means of production, the worker produces new goods which become the property of the capitalist. The essential point about this process is the relation between what the worker produces and what he is paid, both measured in terms of real value. Insofar as the labor contract is 'free', what the worker receives is determined not by the real value of the goods he produces, but by his minimum needs and by the capitalists' requirements for labor power in relation to the number of workers competing for jobs. It is important to understand that even in theory the payment of the worker is not determined by the value of his product." -- Albert Einstein (1949) "Why Socialism?", Monthly Review (May), as reprinted in Out of My Later Years