On the fiftieth anniversary of Hiroshima, Nobel-winning physicist Hans Bethe called on his fellow scientists to stop working on weapons of mass destruction. What drove Bethe, the head of Theoretical Physics at Los Alamos during the Manhattan Project, to renounce the weaponry he had once worked so tirelessly to create? That is one of the questions answered by Nuclear Forces, a riveting biography of Bethe’s early life and development as both a scientist and a man of principle.

As Silvan Schweber follows Bethe from his childhood in Germany, to laboratories in Italy and England, and on to Cornell University, he shows how these differing environments were reflected in the kind of physics Bethe produced. Many of the young quantum physicists in the 1930s, including Bethe, had Jewish roots, and Schweber considers how Liberal Judaism in Germany helps explain their remarkable contributions. A portrait emerges of a man whose strategy for staying on top of a deeply hierarchical field was to tackle only those problems he knew he could solve.

Bethe’s emotional maturation was shaped by his father and by two women of Jewish background: his overly possessive mother and his wife, who would later serve as an ethical touchstone during the turbulent years he spent designing nuclear bombs. Situating Bethe in the context of the various communities where he worked, Schweber provides a full picture of prewar developments in physics that changed the modern world, and of a scientist shaped by the unprecedented moral dilemmas those developments in turn created.

A “second nuclear age” has begun in the post-Cold War world. Created by the expansion of nuclear arsenals and new proliferation in Asia, it has changed the familiar nuclear geometry of the Cold War. Increasing potency of nuclear arsenals in China, India, and Pakistan, the nuclear breakout in North Korea, and the potential for more states to cross the nuclear-weapons threshold from Iran to Japan suggest that the second nuclear age of many competing nuclear powers has the potential to be even less stable than the first.

Strategy in the Second Nuclear Age assembles a group of distinguished scholars to grapple with the matter of how the United States, its allies, and its friends must size up the strategies, doctrines, and force structures currently taking shape if they are to design responses that reinforce deterrence amid vastly more complex strategic circumstances. By focusing sharply on strategy—that is, on how states use doomsday weaponry for political gain—the book distinguishes itself from familiar net assessments emphasizing quantifiable factors like hardware, technical characteristics, and manpower. While the emphasis varies from chapter to chapter, contributors pay special heed to the logistical, technological, and social dimensions of strategy alongside the specifics of force structure and operations. They never lose sight of the human factor—the pivotal factor in diplomacy, strategy, and war.

Herman Kahn was the only nuclear strategist in America who might have made a living as a standup comedian. Indeed, galumphing around stages across the country, joking his way through one grotesque thermonuclear scenario after another, he came frighteningly close. In telling the story of Herman Kahn, whose 1960 book On Thermonuclear War catapulted him into celebrity, Sharon Ghamari-Tabrizi captures an era that is still very much with us--a time whose innocence, gruesome nuclear humor, and outrageous but deadly serious visions of annihilation have their echoes in the "known unknowns and unknown unknowns" that guide policymakers in our own embattled world.

Portraying a life that combined aspects of Lenny Bruce, Hitchcock, and Kubrick, Ghamari-Tabrizi presents not one Herman Kahn, but many--one who spoke the suffocatingly dry argot of the nuclear experts, another whose buffoonery conveyed the ingenious absurdity of it all, and countless others who capered before the public, ambiguous, baffling, always open to interpretation. This, then, is a story of one thoroughly strange and captivating man as well as a cultural history of our moment. In Herman Kahn's world is a critical lesson about how Cold War analysts learned to fill in the ciphers of strategic uncertainty, and thus how we as a nation learned to live with the peculiarly inventive quality of strategy, in which uncertainty generates extravagant threat scenarios.

Revealing the metaphysical behind the dryly deliberate, apparently practical discussion of nuclear strategy, this book depicts the creation of a world where clever men fashion Something out of Nothing--and establishes Herman Kahn as our first virtuoso of the unknown unknowns.