The Island on which Nomadism is based is Madagascar. Nomadism is the practice of moving from one place to another with no permanent settlement. Madagascar, an island nation located off the coast of Southeast Africa, has a long history of nomadic cultures.

Madagascar's nomadic cultures
Madagascar's first inhabitants, the Malagasy, were believed to have arrived on the island around 2000 years ago. They were nomadic people who relied on hunting and gathering for their sustenance. Later, the arrival of Arab and African traders and settlers brought agriculture and pastoralism to the island.

Madagascar's pastoralist communities
The arrival of pastoralist communities in Madagascar brought about a new form of nomadism. These communities were primarily made up of cattle herders who moved their herds from one grazing area to another. The Betsileo and Bara people are two examples of pastoralist communities in Madagascar.

Madagascar's current nomadic communities
Today, there are still nomadic communities in Madagascar, such as the Mikea people. The Mikea people are hunter-gatherers who live deep in the forests of southwestern Madagascar. They move from one area of the forest to another in search of food and resources.

In conclusion, Madagascar is the island on which nomadism is based, with a long history of nomadic cultures and current nomadic communities such as the Mikea people.