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2 results

  • 11 - Taxic Distortions of Lineage Thinking

  • Ronald A. Jenner, Natural History Museum, London
  • Book:
    Ancestors in Evolutionary Biology
    Published online:
    08 July 2022
    Print publication:
    28 July 2022, pp 298-326

  • Summary

    In this chapter I address flaws in lineage thinking that are common in the professional, popular, and eductional literature, and which result from confusing the branching relationships between collateral relatives in the realm of systematics with the linear relationships between ancestors and descendants in the realm of evolutionary descent. The influential voices of the late Stephen Jay Gould and Robert O’Hara, who dubbed the now ubiquitous phrase ‘tree thinking’, have warned readers for decades against the sins of linear evolutionary storytelling and the use of linear evolutionary imagery. However, I argue that their impact has been deeply pernicious. The writings of Gould and O’Hara fundamentally misconstrue the relationship between the branching realm of systematics and the linear realm of evolving lineages. I close with a discussion of the problem that, in the absence of a vocabulary designed to talk about lineages, we are forced to discuss them in the taxic language of systematics. This inevitably causes problems.

Ancestors in Evolutionary Biology
  • Linear Thinking about Branching Trees
  • Ronald A. Jenner
  • Published online:
    08 July 2022
    Print publication:
    28 July 2022
  • Phylogenetics emerged in the second half of the nineteenth century as a speculative storytelling discipline dedicated to providing narrative explanations for the evolution of taxa and their traits. It coincided with lineage thinking, a process that mentally traces character evolution along lineages of hypothetical ancestors. Ancestors in Evolutionary Biology traces the history of narrative phylogenetics and lineage thinking to the present day, drawing on perspectives from the history of science, philosophy of science, and contemporary scientific debates. It shows how the power of phylogenetic hypotheses to explain evolution resides in the precursor traits of hypothetical ancestors. This book provides a comprehensive exploration of the topic of ancestors, which is central to modern biology, and is therefore of interest to graduate students, researchers, and academics in evolutionary biology, palaeontology, philosophy of science, and the history of science.