Piers J. Hale is a scholar of nineteenth-century science, with a specialisation in the history of the social and cultural implications of evolution. In his book Political Descent. Malthus, Mutualism, and the Politics of Evolution in Victorian England (2014), Hale provided a broad overview of the political and moral implications that nineteenth-century Britons took the idea of evolution to have.

Caden C. Testa is a senior graduate student in the history of science and is editorial assistant to the bibliographer of the History of Science Society. He is a scholar of the history of evolutionary ideas with a specialization in Lamarck's transformist philosophy.