The Maasai society is comprised of sixteen sections (known in Maasai as Iloshon)....Ildamat, Ilpurko, Ilkeekonyokie, Iloitai, Ilkaputiei, Ilkankere, Isiria, Ilmoitanik, Iloodokilani, Iloitokitoki, Ilarusa, Ilmatatapato, Ilwuasinkishu, Kore, Parakuyu, and Ilkisonko, also known as Isikirari (Tanzania's Maasai).
Not completely sure but logically people go to cities to find jobs :) hope this helps
