She says this is why Carr's "What is History" was so influential as it was their first introduction to radical different historical frameworks. If this is true, how could a history graduate in America possibly go through their entire degree without encountering Marxist interpretations of history?
The exact quote is "For some of us (I think it fair to say that most American history graduate students in the 1960s were unfamiliar with Marx) reading Carr was our first encounter with a serious alternative framework"
Its on the third page of chapter 6 entitled "What is Gender History Now" which is page 97 in the most up to date edition of the book.
Does she make any citations? I find that statement incredibly hard to believe. I majored in history at Louisiana State University from 1972-1976, and I took more than one course requiring reading not just Marx, but also Hegel, Engels, and even a small dose of Lenin. I was indoctrinated in grammar school to fear communism above all else, and although I didn't learn much about Marx in high school, I knew who he was before going to college.