The semi-nomadic tribes of south Ethiopia and north Kenya have survived rearing livestock for thousands of years. But climate change is coming fast: areas once prone to drought every ten years now experience it every two or three. This exacerbates inter-tribal tensions as fighting over water increases, creating some of the world’s first climate change conflicts. As the deaths rise, tens of thousands are displaced, increasing starvation and dependence upon international aid. Now, Ethiopia’s government is building a dam on the Omo River that will prevent its annual flooding, putting 500,000 tribesmen at risk of annihilation through starvation or war.