Later writers dropped the first "i" in Australioid, establishing Australoid as the standard spelling. Australoid was held to have been one of the five major human races alongside Caucasoid, Mongoloid, Congoid and Capoid. However, under the three race paradigm of Caucasoid, Negroid and Mongoloid, no Australoid category existed.
The Caucasian race (also Caucasoid or Europid) is a grouping of human beings historically regarded as a biological taxon, which, depending on which of the historical race classifications used, have usually included some or all of the ancient and modern populations of Europe, the Caucasus, Asia Minor, North Africa, the Horn of Africa, Western Asia, Central Asia and South Asia.
In 1994, the Mongoloid race, using a broad definition which included indigenous Americans, comprised 34% of the Earth's human population which made it the second most populous race behind Caucasoids who comprised 56% of the Earth's human population at that time.
Coon divided the species Homo sapiens into five groups: Caucasoid, Capoid, Congoid, Australoid and Mongoloid, based on the timing of each taxon's evolution from Homo erectus Positing the Capoid race as a separate racial entity, and labeling the two major divisions of what he called the Congoid race as being the "African Negroes" and the "Pygmies", he divided indigenous Africans into distinct Congoid and Capoid groups based on their date of ancestral origin rather than just phenotype.