The theme of the book is to show how the marriages of the past are approached today is full of myths and controversies. This, along with the book's title, shows that families in the 50s weren't the way we thought they were.
The theme of "The Way We Never Were" refers to the fact that we have believed in myths about relationships and marriages over the years. These myths created a wrong and dubious version of how people lived in the past.
More information on text theme at the link:
https://brainly.com/question/4008478