This led to an interest in the promotion of English into the society of Indian natives. Educated Indians, or 'brown sahibs', wished to participate in academia and pursue professional careers. Raja Rammohan Roy, a social and education reformer, advocated that English be taught to Indians by certain British gentlemen for the benefit and instruction of the native Indians. Charles Grant, the president of the East India Company's board of control, championed the cause of English education as a 'cure for darkness' where 'darkness' was 'Hindoo ignorance'. The Charter Act was passed in 1813. This legalized missionary work by the Company, including the introduction of English education. By the beginning of the twentieth century, English had become the unifying language in the Indian struggle for independence against the British.