The review of the history of neurofeedback shows how the early research became the foundation for the subsequent proliferation of clinical protocols, resolved questions of basic mechanisms, and gives us a perspective on the different schools of thought within the field. The chapter explains how the development of Infra-Low Frequency Neurofeedback can be viewed as a process of incremental refinement and optimization, in seamless continuity with Sterman’s original protocol. In the ILF domain, the training process has become continuous and covert, and thus entirely endogenous.