Bengali nationalism (Bangaliana, Bangali Jatiyotabad) is a form of nationalism that focuses on Bengalis as a singular nation. The people of Bengali ethnicity speak Bengali language. Bengalis mostly live across Bangladesh and the Indian states of Tripura and West Bengal. Bengali nationalism is one of the four fundamental principles according to the original Constitution of Bangladesh. and was the main driving force behind the creation of the Independent nation state of Bangladesh through the 1971 liberation war.
Bengali nationalism is rooted in the expression of pride in the history and cultural heritage of Bengal. After the defeat in the Battle of Plassey on 23 June 1757, and Battle of Buxar in 1764, former Mughal province of Bengal-Bihar came under direct British control in 1772. During British rule, Calcutta served as the capital of British controlled territories in India as well as that of the province of Bengal until 1910. During the period, Calcutta was the center of education. From 1775 to 1941 the emergence of Bengal renaissance (from the birth of Raja Ram Mohan Roy to the death of Rabindranath Tagore) was seen, which has an effect in growing Bengali nationalism. At that time, oriental language started to revive. This time, many of the philosophers did their best among them Fakir Lalon Shah, Raja Ram Mohan Roy, Ishwar Chandra Vidyasagar, Jibanananda Das, Sarat Chandra Chatterjee, Rabindranath Tagore, Kazi Nazrul Islam, Mir Mosharraf Hossain are more influential. In what is described as the Bengal Renaissance, the introduction of Western culture, science and education led to a major transformation and development of Bengali society. Bengal became a centre of modern culture, intellectual and scientific activities, politics and education under British Raj.
The first social and religious reform movements such as the Brahmo Samaj and Ramakrishna Mission arose in Bengal, as did national leaders and reformers such as Raja Ram Mohan Roy, Sri Aurobindo, Ramakrishna Paramhansa and Swami Vivekananda.