Why is Tanzania forcing the Maasai off their ancestral lands?

In northern Tanzania, claims of forcible eviction from the Maasai community have sparked protests in a growing fight with the government. A Maasai delegation is currently in Europe, seeking international help to stop the authorities from moving Maasai communities out of Loliondo, near the Kenyan border, and the Ngorongoro Crater conservation area, which is a UNESCO World Heritage site. Both areas are famous for high-end safari tourism, which contributes significantly to the economy, and the Tanzanian government says they must be protected. But the Maasai claim the decision to relocate them from these lands has destroyed both their lives and livelihoods. [Deutsche Welle]