Real? Where's the overall evidence for that? The capitalist system is inarguably superior to a command economy in terms of supplying what customers want. Does this therefore drive some urge towards genocide on the part of one or the other side?
'It was very much an American invention (the first supermarket in the world was opened in New York’s Queens borough in 1930 – The King Kullen supermarket, invention of former grocery clerk Michael Cullen). By the late 50s, what the women (and surely, even if unacknowledged by the New York Times, men) of Zagreb saw was a clear signal of capitalist superiority in something that mattered much more to them than the conquering of space or new ways to facilitate human extinction: Cheap and plentiful food.'.
https://www.theneweuropean.co.uk/cold-war-supermarket-yugosl...