“Did he have an interesting life?” asked a friend when I mentioned that I had started reading Einstein — His Life and Universe by Walter Isaacson. Yes, he did, very interesting, and Isaacson is an able chronicler. More interesting than previously known, in fact; Isaacson used sources that were newly available at the time of writing (the book was published in 2007) to show that Einstein fathered a daughter with his first wife, Mileva Maric, prior to their marriage. The two went to considerable lengths to ensure that there was no official record of the girl, and both Mileva’s pregnancy and the birth are mentioned only in a very few letters. From the fragmentary evidence that survives, it is not clear whether the girl was given up for adoption, or if she died of scarlet fever in 1903 while in the care of friends or relatives.
From the historical point of view, the discussion of the unknown daughter, referred to as “Lieserl” in the few bits of remaining correspondence, is the most significant new element of this biography. Some FBI files were also newly accessible after 50 years had passed, and Isaacson uses them to show how the Hoover-era Bureau suspected Einstein of subversive tendencies. They also show how a quasi-fascist organization first called Einstein to the FBI’s attention and the bureaucratic after-effects of such a denunciation. Neither of these aspects reflects well on the FBI’s role in a free society, nor in its judgement about political matters. That, unfortunately, is a tale with many chapters.
As the foregoing makes clear, Isaacson writes as much about the private and political Einstein as about the scientist. In his telling, they are all of a piece. Einstein was reflexively anti-authoritarian from an early age, and it was a matter of personality and disposition as much as education. Indeed, his non-conforming personality drove his education, causing him difficulty in the systems of the German-speaking world in the late nineteenth century, but ultimately leading to his momentous insights in physics.