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To expand on the point about Italian v. British colonial influence on Somalia, I think it's important to note that the British left Somaliland to its own devices whereas Italy attempted to turn Southern Somalia into a prize colony.
The British take on their role in Somalia: "We will only seek to minimize conflict in our area, we will not invest or capitalize from the occupation. The only thing worthwhile about our occupation is its strategic location, so we will be hands off except when it comes to conflict avoidance and resolution."
The Italians: "We will invest a lot in our area of Somalia, we will modernize and begin development in the urban areas such as Mogadishu, we will displace a lot of people and have them work in the city to disrupt and fundamentally alter traditional lifestyles, in an ultimate attempt to terraform it for our purposes."
[Southern Somalis spoke great Italian, they know their opera, but they are now in complete anarchy.]

So, Somaliland was never heavily developed or influenced by European colonialism, it was the least influenced of any area in the whole of the Horn and very isolated from European influences but is now the most democratic place in the Horn of Africa. What does that say?
What's worse even for S. Somalia than a state of anarchy is now fundamentalist Islam is gaining a foothold even though the practices and basic concept of such a movement is completely un-Somali. Unfortunately, after existing in profound chaos for an extended period of time, any faction that offers security, structure, and law is preferable no matter how rigid and unnatural to the Somali cultural tradition it might be.