Conversation so far:
What kind of influences from the outside world is the article pertaining to?
Maintaining a traditional pastoral lifestyle has become increasingly difficult due to outside influences of the modern world.
Has this been a positive thing for them or negative?
influence ecologists and policy makers about the harm Maasai pastoralists were causing.
What problems are they having?
policy makers in 1951 to remove all Maasai from the Serengeti National Park and relegate them to areas in and around the Ngorongoro Conservation Area.
Are there any other interesting aspects about this article?
increase in Maasai population, loss of cattle populations to disease, and lack of available rangelands because of new park boundaries and the incursion of settlements and farms.
What kind of lifestyle do they have?
Maintaining a traditional pastoral lifestyle has become increasingly difficult due to outside influences of the modern world.
What have they done to prevent bad influences from the outside world?
policy makers in 1951 to remove all Maasai from the Serengeti National Park and relegate them to areas in and around the Ngorongoro Conservation Area.

Question: Why would they do that?
Self-contained rewrite: Why would the Maasai prevent bad influences from the outside world?