The name India (pronounced) is derived from Indus, which is derived from the Old Persian word Hindu, from Sanskrit Sindhu, the historic local appellation for the Indus River. The ancient Greeks referred to the Indians as Indoi, the people of the Indus. The Constitution of India and common usage in various Indian languages also recognise Bharat as an official name of equal status. Hindustan which is the Persian word for “Land of the Hindus” and historically referred to northern India, is also occasionally used as a synonym for all of India.

The empire built by the Maurya Empire under Emperor Ashoka united most of South Asia in the third century BCE. From 180 BCE, a series of invasions from Central Asia followed, including those led by the Indo-Greeks, Indo-Scythians, Indo-Parthians and Kushans in the north-western Indian subcontinent. From the third century CE, the Gupta dynasty oversaw the period referred to as ancient "India's Golden Age. "Among the notable South Indian empires were the Chalukyas, Rashtrakutas, Hoysalas, Pallavas, Pandyas, and Cholas. Science, engineering, art, literature, astronomy, and philosophy flourished under the patronage of these kings.
Following invasions from Central Asia between the tenth and twelfth centuries, much of north India came under the rule of the Delhi Sultanate, and later the Mughal Empire. Mughal emperors gradually expanded their Kingdoms to cover

During the first half of the twentieth century, a nationwide struggle for independence was launched by the Indian National Congress and other political organizations. In the 1920s and 1930, a movement led by Mahatma Gandhi, and displaying commitment to ahimsa, or non-violence, millions of protesters engaged in mass campaigns of civil disobedience. Finally, on 15 August 1947, India gained independence from British rule, but was partitioned with independent governments for the Dominion of India and the Dominion of Pakistan

Mahatma Gandhi (right) with Jawaharlal Nehru, 1937. Nehru would go on to become India's first prime minister in 1947.

in accordance to wishes of the Muslim League, along the lines of religion to create the Islamic nation state of Pakistan. Three years later, on 26 January 1950, India became a republic and a new constitution came into effect.

The Constitution of India, the longest and the most exhaustive constitution of any independent nation in the world, came into force on January 26, 1950. The preamble of the constitution defines India as a sovereign, socialist, secular, democratic republic. India has a quasi-federal form of government and a bicameral parliament operating under a Westminster-style parliamentary system. It has three branches of governance: the Legislature, Executive, and Judiciary.

The President of India is the official head of state elected indirectly by an electoral college for a five-year term. The Prime Minister is, however, the de facto head of government and exercises most executive powers. The Prime Minister is appointed by the President and, by convention, is the candidate supported by the party or political alliance holding the majority of seats in the lower house of Parliament.

India is the largest democracy in the world. For most of its democratic history, the federal government has been led by the Indian National Congress (INC). State politics have been dominated by several national parties including the INC, the Bharatiya Janata Party (BJP), the Communist Party of India (Marxist) (CPI(M)), and various regional parties. From 1950 to 1990, barring two brief periods, the INC enjoyed a parliamentary majority.

Since its independence in 1947, India has maintained cordial relationships with most nations. It took a leading role in the 1950s by advocating the independence of European colonies in Africa and Asia. India is a founding member of the Non-Aligned Movement. After the Sino-Indian War and the Indo-Pakistani War of 1965, India's relationship with the Soviet Union warmed at the expense of ties with the United States and continued to remain so until the end of the Cold War. India has fought four wars with Pakistan, primarily over Kashmir. India also fought and won an additional war with Pakistan for the liberation of Bangladesh in 1971.

The Sukhoi-30 MKI is part of the Indian Air Force.

India, the major portion of the Indian subcontinent, sits atop the Indian tectonic plate, a minor plate within the Indo-Australian Plate.

India's defining geological processes commenced seventy-five million years ago, when the Indian subcontinent, then part of the southern supercontinent Gondwana, began a northeastwards drift—lasting fifty million years—across the then unformed Indian Ocean. The subcontinent's subsequent collision with the Eurasian Plate and subduction under it, gave rise to the Himalayas, the planet's highest mountains, which now abut India in the north and the north-east.

India, which lies within the Indomalaya ecozone, displays significant biodiversity. Being one of seventeen megadiverse countries, it is home to 7.6% of all mammalian, 12.6% of all avian, 6.2% of all reptilian, 4.4% of all amphibian, 11.7% of all fish, and 6.0% of all flowering plant species. Many ecoregions, such as the shola forests, exhibit extremely high rates of endemism; overall, 33% of Indian plant species are endemic. India's forest cover ranges from the tropical rainforest of the Andaman Islands, Western Ghats, and North-East India to the coniferous forest of the Himalaya. Between these extremes lie the sal-dominated moist deciduous forest of eastern India; the teak-dominated dry deciduous forest of central and southern India; and the babul-dominated thorn forest of the central Deccan and western Gangetic plain.

India's culture is marked by a high degree of syncretism and cultural pluralism. It has managed to preserve established traditions while absorbing new customs, traditions, and ideas from invaders and immigrants.

Multicultural concerns have long informed India’s history and traditions, constitution and political arrangements.

Indian architecture is one area that represents the diversity of Indian culture.Much of it, including notable monuments such as the Taj Mahal and other examples of Mughal architecture and South Indian architecture, comprises a blend of ancient and varied local traditions from several parts of the country and abroad. Vernacular architecture also displays notable regional variation.

Indian music covers a wide range of traditions and regional styles.

Theatre in India often incorporates music, dance, and improvised or written dialogue. Often based on Hindu mythology, but also borrowing from medieval romances, and news of social and political events, Indian theatre includes the bhavai of state of Gujarat, the jatra of West Bengal, the nautanki and ramlila of North India, the tamasha of Maharashtra, the terukkuttu of Tamil Nadu, and the yakshagana of Karnataka

The Mahabodhi Temple, a UNESCO World Heritage Site, at Bodhgaya in Bihar, is one of the four holy sites related to the life of the Lord Buddha, and particularly to the attainment of Enlightenment. The first temple was built by Emperor Asoka in the 3rd century BC, and the present temple dates from the 5th century BC or 6th centuries. It is one of the earliest Buddhist temples built entirely in brick, still standing in India, from the late Gupta period. The Indian film industry is the largest in the world. Bollywood, based in Mumbai, makes commercial Hindi films and is the most prolific film industry in the world. Established traditions also exist in Bengali, Kannada, Malayalam, Marathi, Tamil, and Telugu language cinemas.

The earliest works of Indian literature were transmitted orally and only later written down. These included works of Sanskrit literature – such as the early Vedas, the epics Mahabharata and Ramayana, the drama Abhijnanasakuntalam (The Recognition of sakuntala), and poetry such as the Mahakavya – and the Tamil language Sangam literature. Among Indian writers of the modern era active in Indian languages or English, Rabindranath Tagore won the Nobel Prize in 1913.

Indian cuisine is characterized by a wide variety of regional styles and sophisticated use of herbs and spices. The staple foods in the region are rice (especially in the south and the east) and wheat (predominantly in the north).