“Theories of pain, like all scientific theories, evolve as a result of the accumulation of new facts as well as leaps of the imagination.” ~ Thomas Kuhn
But the changes of pain science wasn't always a linear process. There were a lot of debate, experiments, and speculations that ping-ponged different theories and ideas. A new and “less wrong” may arise, but it won't be accepted the majority — not while in the dinosaur theory's shadow. While many manual therapists who are familiar with pain science have heard about Descartes' introduction to the Specificity theory and GCT, not many may be familiar with the process and the people who bridged both theories.