Abstract: Nation is a political concept and originated in the West.Ernest Renan's "What is a Nation?" is generally regarded as the first discourse on the Western concept of modern nation.Later many theorists have developed the theories of nation, which is a social construct, by experiencing the emergence of various nations till recent past.Nation is ultimately the will for self-determination and it is intimately connected to state.This overtly political concept of nation was strongly debated by Vivekananda in India who foregrounded Vedantic nationalism as an alternative concept / model against the dominating Western ideology.Though Vivekananda's ideas have mostly remained as redundant in India and abroad, a critical re-examination of his India as a nation may be a fitting tribute to him in his sesquicentennial birth anniversary.This endeavour is also important from the postcolonial perspectives.To our astonishment it is found that his theory of nation is unique, modern and as contemporary as the recent theories of nation.His blending of religion and science, Western materialism and Eastern spiritualism, man-making religion, character-building education, etc. are path-breaking and beneficial ideas not only to future India but also to the mankind in general.In Vivekananda the Eastern and the Western paradigms of nation happily fuse for real prosperity of man.