The term "united states" has always been most apt for describing India, a nation of unparalleled variety of peoples and climes, 23 official languages and thousands of dialects. Some villages have been home to particular lineages for so long that residents claim their own dialect is discernible from what's spoken in a town two miles down the road.
Over centuries - millennia even - ruling classes carved out principalities across the Indian subcontinent through war and alliances, fusing early forms of union out of linguistic and geographical affinities. And when India won independence from the British Empire in 1947, most of those "princely states" acceded to India's union, creating one modern nation-state with a population greater than any continent other than Asia.
But India remains loosely united politically and economically.
While the country has two large national political parties, almost every state has one or more powerful parties of its own, and ruling coalitions in state capitals, as well as in New Delhi, are often cobbled together by unlikely coalitions.
Each state also has its own tax laws, and interstate goods transport is highly regulated. Trucks line up at state borders as if entering another country. The tax chaos creates a huge headache for Indian businesses, scares off foreign investment and keeps prices for consumers high.