For whatever reason Krugman chose to highlight the article by MacDonald. The part of the article that had the most impact was bringing attention of Michael Harr

For whatever reason Krugman chose to highlight the article by MacDonald. The part of the article that had the most impact was bringing attention of Michael Harrington's book, "The Other America" to President Kennedy. That book, for better or worse was largely the impetus for LBJ's Great Society.