Donald Alexander Mackenzie (24 July 1873 – 2 March 1936) was a Scottish journalist and folklorist and a prolific writer on religion, mythology and anthropology in the early 20th century.
His older brother was William Mackay Mackenzie, Secretary of the Royal Commission on Ancient and Historical Monuments of Scotland between 1913 and 1935.
Professor of Philosophy Vergilius Ferm reviewed the work positively, but other scholars criticised it for its lack of evidence.
This indigenous proto-Mediterranean racial stock was later invaded by another "variety of the Mediterranean race" who initiated the Solutrean culture around 20,000 years ago (p. 50).
Mackenzie also believed that there was a highly depigmented racial type in small numbers in Britain during the Magdalenian, perhaps who were also blonde, who intermingled with the "dark Iberians" (p. 60).
They had black or brown hair, and swarthy skin "like those of the Southern Italians" (p. 126) and have survived in numerous pockets of Britain to the modern day (p. 139) despite that the later Anglo-Saxon and Norse settlement, who were fairer in appearance, Mackenzie believed their genetic input or admixture was very limited but that they subjugated the British imposing a new civilization and culture (p. 227).