The Gene — An Intimate History

A History Both Scientific and Personal

Siddhartha Mukherjee is an oncologist and Pulitzer Prize-winning author (The Emperor of All Maladies) whose family includes multiple members with schizophrenia and bipolar disorder. His investigation of the gene is simultaneously a scientific and personal history: he wants to understand the science of heredity partly because he wants to understand his own family’s story.

This dual structure — rigorously scientific and deeply personal — gives The Gene an emotional weight that most science histories lack. Mukherjee’s interest in genetics is not abstract; it is an attempt to understand the biological forces that shaped people he loves, and that may shape his own future.

From Mendel to CRISPR

The book’s historical arc spans from Gregor Mendel’s meticulous pea experiments in an Augustinian monastery in 1856 to the CRISPR-Cas9 gene-editing revolution of the 2010s. In between, Mukherjee covers the discovery of DNA’s structure by Watson and Crick (and the largely uncredited Rosalind Franklin), the development of genetic sequencing, the Human Genome Project, and the emerging science of epigenetics.

The history of genetics is not a triumphalist narrative. Mukherjee is unflinching about the devastating chapter of eugenics — the scientifically dressed ideology of genetic improvement that provided intellectual cover for forced sterilisations and, ultimately, the Holocaust. The gene’s history is inseparable from this horror, and Mukherjee insists on remembering it as genetic power rapidly expands.

The CRISPR Revolution

The book’s final sections on CRISPR are among the clearest and most ethically serious accounts of gene editing available for general readers. CRISPR-Cas9 — discovered and developed through a series of brilliant collaborations involving researchers across several countries — allows precise, targeted editing of any DNA sequence in any cell. Its implications for medicine, agriculture, and eventually human germline editing are genuinely unprecedented.

Mukherjee approaches these implications with appropriate seriousness. The question of whether to edit heritable human genetic variants — to eliminate disease predispositions in future generations — is one the book explores carefully without pretending to resolve.

The Personal Thread

What separates The Gene from a competent textbook history is the family story braided through it. Mukherjee opens and returns to the experience of mental illness in his own family — uncles and a cousin afflicted with schizophrenia and bipolar disorder across generations — and this thread transforms an account of heredity into a deeply personal inquiry. The science of the gene is, for Mukherjee, never abstract; it is an attempt to understand the biological forces that shaped people he loves and that may shape his own future and his children’s. This framing gives the book its emotional gravity and its urgency: the abstract question of how traits pass from parent to child becomes the intimate question of what he himself carries and might transmit. It is a model of how to humanize science writing without sacrificing rigor, and it is part of why the book reaches readers who would never pick up a conventional genetics primer.

The History of an Idea

Mukherjee structures The Gene as the biography of a concept, tracing how humanity’s understanding of heredity evolved from Mendel’s pea plants in a monastery garden through Darwin’s theory of inheritance, the rediscovery of Mendel, the identification of DNA, Watson and Crick’s double helix, the Human Genome Project, and into the era of editing. This long arc lets him show science as a human, halting, often contentious process rather than a smooth march of discovery, and he is scrupulous about restoring credit to figures the popular narrative has slighted, most notably Rosalind Franklin, whose crystallography was essential to the double-helix breakthrough. The result is a history that conveys both the intellectual excitement of each advance and the contingency behind it, the false starts and rivalries and lucky breaks. Readers come away understanding not just what we know about genes but how that knowledge was painstakingly, and imperfectly, won.

The Shadow of Eugenics

The book’s moral center is its unflinching treatment of eugenics, the pseudoscientific ideology of genetic “improvement” that gave intellectual cover to forced sterilizations in the United States and, ultimately, to the racial exterminations of the Holocaust. Mukherjee refuses to treat this as a closed historical chapter; he insists that the history of genetics is inseparable from its abuses, and that remembering them is essential precisely because genetic power is now expanding faster than ever. As CRISPR makes it conceivable to edit the human germline — to alter traits in ways that pass to all future generations — the questions that eugenics answered so monstrously return in new form, and Mukherjee argues that scientific capability has outrun our ethical frameworks. This refusal to separate the triumphs of genetics from its temptations is the book’s most important contribution, lending its science a moral seriousness rare in the genre.

A Sequel in Spirit

The Gene is in many ways a companion to Mukherjee’s Pulitzer-winning The Emperor of All Maladies, his “biography of cancer,” and the two books share a method: the biography of a scientific subject told through history, reportage, and memoir, written with a clinician’s precision and a novelist’s feel for narrative. Where the earlier book traced humanity’s long struggle against a disease, The Gene traces our deepening power over the code of life itself, and the progression between them charts Mukherjee’s growing concern with the ethical weight of medical knowledge. Together they have established him as perhaps the foremost physician-writer of his generation, capable of making the most technical science legible and urgent to a general audience. For readers who admired the first book, The Gene delivers the same fusion of comprehensiveness, clarity, and moral seriousness, applied to a subject whose stakes for the human future may be even higher.

Final Verdict

The Gene is a masterwork of science writing — comprehensive, precise, personal, and morally serious. Required reading for anyone who wants to understand the biology of inheritance and the ethical landscape of the genomic era.

Our rating: 4.6/5 — One of the best science books of the decade. The intersection of personal and scientific history is handled with extraordinary skill.