India is a parliamentary republic consisting of 28 states and 7 union territories. It has the world's twelfth largest economy at market exchange rates and the fourth largest in purchasing power. Economic reforms have transformed it into the second fastest growing large economy; however, it still suffers from high levels of poverty, illiteracy, and malnutrition. A pluralistic, multilingual, and multiethnic society, India is also home to a diversity of wildlife in a variety of protected habitats.Home to the Indus Valley Civilisation and a region of historic trade routes and vast empires, the Indian subcontinent was identified with its commercial and cultural wealth for much of its long history. Four major religions, Hinduism, Buddhism, Jainism and Sikhism originated here, while Zoroastrianism, Judaism, Christianity and Islam arrived in the first millennium CE and shaped the region's diverse culture.