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Was Homo habilis a direct ancestor of Homo erectus?

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An illustration of Homo habilis, an early human ancestor, shown walking upright with a hairy body and ape-like features. A scale beside the figure indicates height in inches and centimeters. — Homo habilis Artist's rendering of *Homo habilis*, which lived from 2 to 1.5 million years ago.

Whether Homo habilis served as a direct ancestor to Homo erectus remains a subject of scientific debate rather than a settled fact.

Some paleoanthropologists propose a linear evolutionary model in which the large-brained H. habilis evolved into H. erectus while other, smaller-brained hominins became extinct. However, this view is contested by evidence suggesting that early human populations were more diverse. Some researchers argue that H. habilis and H. erectus may have lived contemporaneously for a period, as indicated by fossil records from sites like Koobi Fora, where both species have been found in overlapping timeframes.12

Furthermore, some scientists suggest that the australopith Australopithecus sediba is a more likely direct ancestor of H. erectus due to its morphological similarities to that species. Given these competing theories and the complexity of hominin phylogeny, there is no firm consensus on the exact ancestral relationship between H. habilis and H. erectus.13