This book traces the history of life-concepts, with a focus on the vegetable souls of Aristotle, investigating how they were interpreted and eventually replaced by evolutionary biology.

This book provides a straightforward introduction to teleology in biology, the work it did and the work it can do. Informed by history and philosophy, it focuses on scientific concerns. Seventeenth, eighteenth, and nineteenth century biologists proposed a menagerie of biological “actors” to explain power without appealing to Aristotelian vegetable souls and final causes. Three constraints on teleology narrowed the field, selecting among the various actors as they mutated and recombined. Methodological naturalism, local adaptation, and blind chance each represent a significant...