High Quality Content by WIKIPEDIA articles! Angie Elbertha Debo (January 30, 1890 – February 21, 1988) was an American historian who wrote 13 books and hundreds of articles about Native American and Oklahoma history. After a long career marked by difficulties (ascribed both to her gender and to the controversial content of some of her books), she was acclaimed as Oklahoma`s "greatest historian" and acknowledged as "an authority on Native American history, a visionary, and a historical heroine in her own right."