The peoples of Indonesia differ widely in culture. All stages of social JL development are represented among them, from the nomad life of the Orang Laut, who wander in their praus upon the sea, and the Orang Kubu, who were, until recently, nomads of the forests in South Sumatra, up to the high forms of social and cultural attainment on the island of Bali, where the arts of the dance, of music, of sculpture, of temple architecture have reached a high peak and people live their lives in a harmoniously organized social order.