Reddit mentions of Worlds of Pain

I have a couple of books to recommend: Crossing the Tracks for Love: What to Do When You and Your Partner Grew Up in Different Worlds, Unequal Childhoods: Class, Race, and Family Life. Also maybe Lillian Rubin's Families on the Fault Line and Worlds Of Pain.

Sociology won't fix your problems, but it definitely helps if you can understand where each of you are coming from. I would recommend you both read those and maybe some other similar books. Not everybody is a huge Ruby Payne fan, but she does a good job at just bluntly discussing why people raised in lower-class environments behave the way they do which is a really helpful thing to understand when you are trying to forge a meaningful relationship with somebody whose family are drunks and your parents were accountants.