The Indonesian archipelago has been an important trade region since at least the 7th century, when Srivijaya and then later Majapahit traded with China and India. Local rulers gradually absorbed foreign cultural, religious and political models from the early centuries CE, and Hindu and Buddhist kingdoms flourished.Indonesian history has been influenced by foreign powers drawn to its natural resources. Muslim traders and Sufi scholars brought the now-dominant Islam, while European powers brought Christianity and fought one another to monopolise trade in the Spice Islands of Maluku during the Age of Discovery. Following three and a half centuries of Dutch colonialism starting from the East Indonesia of West Papua, Timor to eventually all of West Indonesia, at times interrupted by Portuguese, French and British rule, Indonesia secured its independence after World War II. Indonesia's history has since been turbulent, with challenges posed by natural disasters, mass slaughter, corruption, separatism, a democratisation process, and periods of rapid economic change.