The Alpine race is a historical race concept defined by some late 19th-century and early 20th-century anthropologists as one of the sub-races of the Caucasian race.[1][2][3] The origin of the Alpine race was variously identified. Ripley argued that it migrated from Central Asia during the Neolithic Revolution, splitting the Nordic and Mediterranean populations. It was also identified as descending from the Celts residing in Central Europe in Neolithic times.[4] The Alpine race is supposedly distinguished by its moderate stature, neotenous features,[dubious – discuss] and cranial measurements, such as high cephalic index.[5]