I saw a source somewhere that talked about how somali merchants were discussing the crimea war and europeans were shocked as to how we knew of this when it only started a few days ago. If I find the source I will post it here.Connectivity:
Somalia is characterized mostly by flatter gently rolling terrains like plains and plateaus which facilitate easier movement of people, goods, and ideas. This promotes greater interaction and integration among communities, leading to more cultural and linguistic uniformity over time. Somalis were in constant communication and contact with eachother over vast land and distances as much as we were also in constant contact with the world outside our lands. It not only resulted in creation trade networks but also familial bonds.
Whereas other Africans are separated from each-others by mountains, sahara desert, savannahs or thick forests, creating severe geographical boundaries where people develop distinct linguistic and culture differences in isolation. So it inhibited connection building, sharing of resources, technology , ideas etc
This is why Africans prior to the Arrival of Europeans were bunch of seperate isolated tribes and are broken into many different languages. They had very little to no contact with the outside world as well.
Therefore they have been the most insulated people from the rest of the human races and isolated people have always lagged behind the rest.