Grahams
Question.
How far back does a modern day youth from southern Tanzania, like Harmonize, have to go to have a common ancestor with Benjamin Mkapa?".
Answer (Meta AI)
A really short time — probably only a few hundred years.
Benjamin Mkapa was born in Lupaso, Masasi — that's in Mtwara Region. Harmonize [Rajab Abdul Kahali] was born in Mtwara town. Both are from the deep south, and Mkapa was ethnically Makonde on his father's side, Makua on his mother's. Harmonize is Makonde.
So you're not asking about "all humans have a common ancestor 5,000 years ago" — you're asking about two guys from the
same corner of Tanzania.
Here's how it breaks down:
1. If both are Makonde / Makua from Mtwara-Masasi:
The Makonde and Makua are Bantu peoples who have lived in that exact area for ∼1,000-1,500 years, but villages intermarry constantly. In a rural district of 300,000 people with endogamy, the coalescence time — the point where any two random men share a genealogical ancestor — is usually
10-20 generations, or 250-500 years.
You go back 15 generations, you have 32,000+ theoretical ancestors, but the actual population of Mtwara in 1800 was much smaller than that, so your family trees collapse into each other. Everyone is cousin to everyone.
Mkapa was born 1938, Harmonize 1994. If you traced both their paternal and maternal lines back to ∼1750-1800 in Mtwara/Masasi, you would almost certainly hit the same village ancestor.
2. If you mean genetically, not just genealogically:
On the autosomal DNA level, any two southern Tanzanian Bantu youth share a common ancestor in the last
∼1,000 years due to the Bantu expansion. Southern Tanzania was settled by Bantu farmers from the west around 300-800 AD, and since then there has been continuous gene flow between Makonde, Makua, Yao, Mwera.
So:
- Genealogical common ancestor (a name in a family tree): ∼300-500 years
- Genetic common ancestor (a chunk of DNA): ∼800-1,500 years
For comparison, a youth from southern Tanzania and a youth from northern Tanzania, like Chagga from Kilimanjaro, would have a common ancestor maybe 1,500-2,500 years back. A southern Tanzanian and a Khoisan hunter-gatherer would be ∼20,000-30,000 years.
Mkapa and Harmonize are practically neighbors in deep time.