Malwa is a historical region of west-central India occupying a plateau of volcanic origin. Geologically, the Malwa Plateau generally refers to the volcanic upland north of the Vindhya Range. Politically and administratively, it is also synonymous with the former state of Madhya Bharat which was later merged with Madhya Pradesh. At present the historical Malwa region includes districts of western Madhya Pradesh and parts of south-eastern Rajasthan. Sometimes the definition of Malwa is extended to include the Nimar region south of the Vindhyas. The Malwa region had been a separate political unit from the time of the ancient Malava Kingdom. It has been ruled by several kingdoms and dynasties, including the Avanti Kingdom, The Mauryans, the Malavas, the Guptas, the Paramaras, the Delhi Sultanate, the Malwa sultans, the Mughals and the Marathas. Malwa continued to be an administrative division until 1947, when the Malwa Agency of British India was merged into Madhya Bharat (also known as Malwa Union) state of independent India. Although its political borders have fluctuated throughout history, the region has developed its own distinct culture, influenced by the Rajasthani, Marathi and Gujarati cultures. Several prominent people in the history of India have lived in Malwa, including the poet and dramatist Kalidasa, the author Bhartrihari, the mathematicians and astronomers Varahamihira and Brahmagupta, and the polymath king Bhoja. Ujjain had been the political, economic, and cultural capital of the region in ancient times, and Indore is now the largest city and commercial centre. Overall, agriculture is the main occupation of the people of Malwa. The region has been one of the important producers of opium in the world. Wheat and soybeans are other important cash crops, and textiles are a major industry. Malwi is a demonym given to people from the Malwa region. History Several early Stone Age or Lower Paleolithic habitations have been excavated in eastern Malwa. The name Malwa is derived from the name of the ancient Indian tribe of Malavas. The name Malava is said to be derived from the Sanskrit term Malav, which means "part of the abode of Lakshmi". The location of the Malwa or Moholo, mentioned by the 7th-century Chinese traveller Xuanzang, is plausibly identified with present-day Gujarat. The region is cited as Malibah in Arabic records, such as Kamilu-t Tawarikh by Ibn Asir. The Malwa Culture was a Chalcolithic archaeological culture which existed in the Malwa region, as well as nearby parts