And not in the Marxist sense of a base that determines a superstructure, or a base that has such a two-way relationship with a superstructure. No, this statement of Jung’s talks about a compensatory sentimentality that popular culture brings in a world crippled by brutality and war.
This is Jung in The Spirit in Man, Art, and Literature. I have the 2003 Routledge edition but I found the 1971 Princeton edition (Collected Works of Jung Vol. 15) selling on Amazon for $12.57.