Ribot’s Law was first postulated by the French psychologist Théodule Ribot (1839 -1916), who is recognized as one of the pioneer 19th century advocates for psychology as an objective and biologically-based empirical field. Ribot’s split from the mainstream “Eclectic” psychology of the era was associated with a transition from philosophical to evolutionary explanations of human psychology and behavior.[1] As Ribot was not a true experimentalist himself, this increased focus on the natural science basis of human mentality was manifested in an interest for case studies and diseases of dysfunction which helped to shape theories of psychological function. Ribot’s Law actually was first defined in terms of a broad generalization of functional decline in psychopathology: the observation that functions acquired most recently are the first to degenerate.[2] However, in the current context of neuroscience research, Ribot’s Law is used almost exclusively to describe the perceived effect of older memories being less prone to disruption.