Blah! I feel like such a chump. Sometimes I can just go on and on about something without ever seeming to make much sense.
Anyway, tribalism itself is a loaded word these days. For some reason the word still conjures up images of primitive hunter-gatherers and projects the notion of a backwards people still living in the caves. This is all nonsense. Tribes, or ethnic groups, are bound together by a common language and a common culture. Just think about Germans living in Germany or Spaniards living in Spain. These various groups of people have set up borders that generally enables people bound by custom and language to inhabit the same territory. Now, this is not to say the system is perfect, or that everyone is happy with it, but this arrangement - small, homogeneous political states bound by language and custom - has contributed significantly to Western prosperity.
This brings me to the Third World. The violence we see today coming from these regions stems from a society or ethnic group's inability to declare independence - REAL independence! - from colonial policy and tyrannical rule. Remember, the Marxists who violently seized power kept the colonial boundaries intact! This was done so that Marxist policy could be carried out more effectively. Oh, and remember, the colonial boundaries were not drawn up randomly, for the Europeans had to work hard to conquer Africa, and the intentional division of ethnic groups between the colonial powers was designed to keep the African tribes/nations/kingdoms/confederations from regaining power.
All too often the West is quick to condemn rebellions, offer military aid to totalitarian governments, and sometimes even resort to putting troops on the ground and "maintain or restore order" (in an ironic twist of fate, most U.N. troops are composed of soldiers hailing from former colonies, while the commanding officers generally come from the West) for the sake of preserving a certain failed state. This is a mistake. Most of the rebellions that continually flare up are based upon rational calls for self-governance and liberation of tribal land from a (in the rebel's point of view) colonial government.
A policy of the West towards the Third World may do well to begin to officially recognize separatist movements as legitimate, and cease providing arms and aid to totalitarian governments abroad. In the meantime, do yourself a favor and decide to fully support an armed rebellion in some part of the world you may never had heard of!