Abstract

William Lawrence Tower’s work on the evolution of the Colorado Potato Beetle (_Leptinotarsa decemlineata_), documenting the environmental induction of mutation and speciation, made him a leading figure in experimental genetics during the first decade of the 20th century. His research program served as a model for other experimental evolution studies seeking to demonstrate the environmental modification of inheritance. Tower enjoyed the support of influential figures in the field, despite well-known problems that plagued Tower’s earlier academic career. The validity of his genetic work, and other findings reported by Tower, were later challenged. The Tower affair illustrates how questionable and possibly fraudulent scientific practices can be tolerated to explore certain experimental directions and theoretical frameworks, particularly at the frontier of expanding disciplines. When needed, those explorations can be forestalled or extinguished by exploiting conspicuous vulnerabilities of rogue practitioners. In Tower’s case, both unrefuted allegations of scientific misconduct and personal problems dissolved his institutional support, leading to a swift ouster from academic science. Tower’s downfall discredited soft inheritance and neo-Lamarckian conceptions in the field of experimental genetics, facilitating the discipline’s embrace of a hard inheritance model that featured a hereditary material resistant to environmental modification.