This work investigates the quantitative distribution of avoidable cancer risks within the United States population to determine which environmental and lifestyle factors contribute most significantly to cancer mortality. Richard Doll and Richard Peto, both distinguished epidemiologists, synthesize vast amounts of clinical and statistical data to construct a framework for understanding cancer causation. They argue that a significant portion of cancer incidence is linked to modifiable factors, providing a systematic analysis that separates established causal links from speculative hypotheses. The text serves as a foundational assessment for public health policy and individual risk management.

Experts recognize this text as a seminal contribution to the field of cancer epidemiology due to its rigorous statistical approach and clarity. Readers frequently note the academic density of the prose, yet acknowledge its accessibility to students and professionals alike.