The All India Muslim League was founded in 1906 to represent Muslim interests in British India, with its leaders advocating for Hindu-Muslim harmony until 1940 when the call for a separate Muslim state emerged. Factors leading to its formation included British policies, political disunity among Indians, and cultural revivalism, particularly among Hindus. After the 1947 partition, the league was dissolved in India but later reformed in Pakistan and India, though it lost political significance over time.