Standing proudly carrying their AK-47s, these powerful pictures of indigenous tribes show how previously untouched groups are being influenced by the outside world.
The images, which capture six different remote tribes living in South Omo, Ethiopia, reveal how elements of the modern world are slowly starting to be introduced into their traditional culture.
One young mother can be seen breastfeeding her child as she cradles an automatic weapon under her arm. In another compelling image, an elder from the Hamer tribe poses with a gun carried over his shoulders.
Kenyan-born photographer Neil Thomas captured images of members of the Arbore, Dassanech, Hamer, Karo, Mursi and Suri tribes as part of this photo series.
Perhaps the tribe with the most elaborate body decoration is the Karo – they imitate the plumage of the guinea fowl by dabbing their torsos with white chalk paint before important ceremonies.
More than 40 tribes reside within South Omo and the valley is home to about 200,000 people.
Due to the development of new road networks and telecommunication networks, the area has become more accessible to the outside world and globalisation has made its mark on the Omo Valley.
As the government has taken over more and more tribal land, competition for scarce resources has intensified and the introduction of firearms has made inter-ethnic fighting more dangerous.