The historical notes section is the only break from Offred's narrative at the very end of the novel which follows a lecture given by Professor Piexto many years after the dismantle of Gilead
The Historical notes reframe the narrative of the novel within the widerhistoricalcontext in which Gilead exists which gives the reader the impression that Offred'sstory is only a small part of the large scale atrocitiescommitted within Gilead
It can be argued that the Historicalnotes show that importantstories are always told regardless of the restrictions those telling them face as Offred'sstory is told although she is banned from being "allowed to read or write" by Gilead