Book excerpt: How does the past live in us? Do we inherit our ancestors' memories as we do their physical characteristics? In the nineteenth century, mainstream science embraced a long-standing superstition: the belief that memory could be inherited. Scientists reasoned that, just as bodies were reproduced from generation to generation, so were thoughts, memories, and cultural achievements. Heredity and identity were no mere family matter, but the basis of nations. The glories and sins of the past were not gone: they remained in the tissues of living people, who could be honored or blamed accordingly. Organic Memory surveys the literary and scientific history of an idea that will not go away. Focusing on the years between 1870 and 1918, Otis explores both the origins and the consequences of the idea that memories can be inherited. The organic memory theory contributed to the genocidal programs of the Third Reich, and it erupts in pop-psychology, racist propaganda, and ethnic cleansing. To track the spread, intensity, and endurance of this especially powerful idea, Otis singles out major authors whose work reinforced or ridiculed belief in organic memory. They include writers who were internationally influential yet who simultaneously represented their national traditions: Thomas Mann, Sigmund Freud, C. G. Jung, Emile Zola, Thomas Hardy, Miguel de Unamuno, P�o Baroja, Emilia Pardo Baz¾n, and even Sir Arthur Conan Doyle. The debates over the human genome project and the explosions of ethnic violence in the former Yugoslavia, in Azerbaijan, Somalia, and elsewhere demonstrate how seriously organic memory continues to affect modern medicine and politics.