Critically discuss the centrality of the African continent in the narrative of human evolution. (Answer in 250 words)

- Critically discuss the centrality of the African continent in the narrative of human evolution. (Answer in 250 words)
Introduction
Africa's centrality is the best-evidenced proposition in palaeoanthropology, but it is strongest for the earliest events and weakest for the last hundred thousand years.

Body
1. The evidence: every hominin older than two million years is African — Sahelanthropus from Chad at about seven million years, Orrorin from the Tugen Hills, Ardipithecus ramidus at Aramis, Australopithecus afarensis at Hadar and Laetoli, africanus at Taung. The earliest Homo is the Ledi-Geraru mandible, the earliest tools Lomekwi 3 and the Oldowan at Gona, the earliest Homo sapiens Jebel Irhoud at about 315,000 years and Omo Kibish. Genetically, African populations hold the greatest diversity, every non-African lineage is a subset of theirs, and both the mitochondrial and the Y trees root in Africa.
2. The events it explains: the origin of bipedalism, of the genus Homo and stone tools, of Homo erectus and the first dispersal that reached Dmanisi, and of modern humans and their exit about sixty thousand years ago.
3. The challenges: the primitive hominins at Dmanisi and claims for Graecopithecus in the Balkans keep a Eurasian element alive; the multiregional model of Wolpoff survives in weakened form because Neanderthal and Denisovan admixture is now proven, so replacement was leaky rather than total. The record is also biased — the East African Rift preserves and dates bone as the Congo forests do not, and ancient DNA rarely survives African heat. Scerri's pan-African model argues that sapiens arose from a structured continental metapopulation, not one cradle.
4. The verdict: centrality is secure for origins and qualified for what followed.

Conclusion
Africa remains the continent of origin on fossil, archaeological and genetic evidence alike. What has gone is the single cradle and the clean replacement that once travelled with it.