Conversation so far:
What kind of influences from the outside world is the article pertaining to?
British colonial policy makers in 1951 removed all Maasai from the Serengeti National Park and relegate them to areas in and around the Ngorongoro Conservation Area (NCA)
Has being relegated to the Ngorongoro Conservation Area (NCA) been a positive thing for the Maasai people or negative?
The plan for the NCA was to put Maasai interests above all else, but this promise was never met. The spread of HIV was rampant.
What problems are the Maasai people having after being relgated to the NCA?
Loss of cattle populations to disease, lack of available rangelands because of new park boundaries and other tribes, the Maasai were forced to develop new ways of sustaining themselves.
Are there any other interesting aspects about influences from the outside world upon the Maasai people besides being relegated to the NCA, the spread of HIV, loss of cattle populations, lack of available rangelands, and being forced to develop new ways of sustaining themselves?
Many Maasai began to cultivate maize and other crops to get by, a practice that was culturally viewed negatively.

Question: What kind of lifestyle do they have?
Self-contained rewrite: What kind of lifestyle do the Maasai people have?