The Hadza, or Hadzabe, are an ethnic group in north-central Tanzania, living around Lake Eyasi in the central Rift Valley and in the neighboring Serengeti Plateau. The Hadza number just under 1,000. Some 300–400 Hadza live as hunter-gatherers, much as their ancestors have for thousands or even tens of thousands of years; they are the last full-time hunter-gatherers in Africa.
The Hadza are not closely genetically related to any other people. While traditionally classified with the Khoisan languages, primarily because it has clicks, the Hadza languageappears to be an isolate, unrelated to any other. The descendants of Tanzania’s aboriginal hunter-gatherer population, they have probably occupied their current territory for several thousand years, with relatively little modification to their basic way of life until the past hundred years.
Since the 18th century, the Hadza came into increasing contact with farming and herding people entering Hadzaland and its vicinity; the interactions were often hostile and caused population decline in the late 19th century.The first European contact and written accounts of the Hadza are from the late 19th century. Since then, there have been many attempts by successive colonial administrations, the independent Tanzanian government, and foreign missionaries to settle the Hadza, by introducing farming and Christianity.These have largely failed, and many Hadza still pursue virtually the same way of life as their ancestors are described as having in early 20th century accounts.In recent years, they have been under pressure from neighbouring groups encroaching on their land, and also affected by tourism and safari hunting.
http://en.wikipedia.org/wiki/Hadza_people
Ethnographic materials ML. 