For his historical period, The Interpretation of Dreams revolutionized the study of dreams and led to greater understanding of the aspects of the human personality as it related to psychopathology. This modern edition of the Interpretation of Dreams was translated to English by Daniel T. O'Hara and Gina Masucci MacKenzie and they made some changes to the previous edition. included extensive footnotes by Freud and the translators, endnotes by the translators, and an extensive introduction that included background material on Freud and his Times. The translators also gave an extensive bibliography including other works by Freud and biographies written about him. Finally, the translators provided comments from famous personages, briefly discussed translation issues, and asked readers insightful questions.