Lamarck's Revenge

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This compelling exploration of epigenetics reveals surprising insights into inheritable traits. Initially described by Jean-Baptiste Lamarck in the 1700s to explain the inheritance of acquired characteristics, epigenetics was overshadowed by Darwin's theory of evolution through genetic mutations in the 1800s. However, natural selection could not fully account for the rapid re-diversification of species after mass extinctions. Recent advancements in DNA and RNA studies have revived interest in epigenetics, demonstrating how a single small molecule can induce significant physical and physiological changes in future generations, influencing where molecules attach in descendants. Peter Ward, a paleontologist and astrobiologist, simplifies this complex process for general readers, using it to reassess the history of our species—from ancient times through the Black Plague to the present—and its impact on our physiology, behavior, and intelligence. Particularly concerning are the chapters detailing current epigenetic changes driven by toxins, environmental pollutants, famine, poor nutrition, and exposure to violence. This eye-opening examination reveals how traits are inherited and how external influences shape what we pass on to future generations.