One of the earliest civilizations, the Indus Valley civilization flourished on the Indian subcontinent from c. 2600 B.C. to c. 2000 B.C. It is generally accepted that the Aryans entered India c. 1500 B.C. from the northwest, finding a land that was already home to an advanced civilization. They introduced Sanskrit and the Vedic religion, a forerunner of Hinduism. Buddhism was founded in the 6th century B.C. and was spread throughout northern India, most notably by one of the great ancient kings of the Mauryan dynasty, Asoka (c. 269–232 B.C.), who also unified most of the Indian subcontinent for the first time.

In 1526, Muslim invaders founded the great Mogul Empire, centered on Delhi, which lasted, at least in name, until 1857. Akbar the Great (1542–1605) strengthened and consolidated this empire. The long reign of his great-grandson, Aurangzeb (1618–1707), represents both the greatest extent of the Mogul Empire and the beginning of its decay.

Vasco da Gama, the Portuguese explorer, landed in India in 1498, and for the next 100 years the Portuguese had a virtual monopoly on trade with the subcontinent. Meanwhile, the English founded the East India Company, which set up its first factory at Surat in 1612 and began expanding its influence, fighting the Indian rulers and the French, Dutch, and Portuguese traders simultaneously.

Bombay, taken from the Portuguese, became the seat of English rule in 1687. The defeat of French and Mogul armies by Lord Clive in 1757 laid the foundation of the British Empire in India. The East India Company continued to suppress native uprisings and extend British rule until 1858, when the administration of India was formally transferred to the British Crown following the Sepoy Mutiny of native troops in 1857–1858.

After World War I, in which the Indian states sent more than 6 million troops to fight beside the Allies, Indian nationalist unrest rose to new heights under the leadership of a Hindu lawyer, Mohandas K. Gandhi, called Mahatma Gandhi.
Gandhi was released in 1944 and negotiations for a settlement were resumed. Finally, in Aug. 1947, India gained full independence. The victory was soured, however, by the partitioning of the predominantly Muslim regions of the north into the separate nation of Pakistan.. The partition of Pakistan and India led to the largest migration in human history, with 17 million people fleeing across the borders in both directions to escape the bloody riots occurring among sectarian groups. Armed conflict also broke out over rival claims to the princely states of Jammu and Kashmir.

Jawaharlal Nehru, nationalist leader and head of the Congress Party, was made prime minister. In 1949, a constitution was approved, making India a sovereign republic. Under a federal structure the states were organized on linguistic lines. The dominance of the Congress Party contributed to stability. In 1956, the republic absorbed former French settlements. Five years later, the republic forcibly annexed the Portuguese enclaves of Goa, Damao, and Diu.

In 1971, the Pakistani army moved in to quash the independence movement in East Pakistan that was supported by India, and some 10 million Bengali refugees poured across the border into India, creating social, economic, and health problems. After numerous border incidents, India invaded East Pakistan and in two weeks forced the surrender of the Pakistani army. East Pakistan was established as an independent state and renamed Bangladesh.

In May 1975, the 300-year-old kingdom of Sikkim became a full-fledged Indian state. Situated in the Himalayas, Sikkim was a virtual dependency of Tibet until the early 19th century. Under an 1890 treaty between China and Great Britain, it became a British protectorate and was made an Indian protectorate after Britain quit the subcontinent.

In the summer of 1975, the world's largest democracy veered suddenly toward authoritarianism when a judge in Allahabad, Indira Gandhi's home constituency, found Gandhi's landslide victory in the 1971 elections invalid because civil servants had illegally aided her campaign. Amid demands for her resignation, Gandhi decreed a state of emergency on June 26 and ordered mass arrests of her critics, including all opposition party leaders except the Communists.

In 1984, Gandhi ordered the Indian army to root out a band of Sikh holy men and gunmen who were using the most sacred shrine of the Sikh religion, the Golden Temple in Amritsar, as a base for terrorist raids in a violent campaign for greater political autonomy in the strategic Punjab border state..

On Oct. 31, 1984, Indira Gandhi was assassinated by two men identified by police as Sikh members of her bodyguard. The ruling Congress Party chose her older son, Rajiv Gandhi, to succeed her as prime minister for four years. While running for reelection, Rajiv Gandhi was assassinated on May 22, 1991, by Tamil militants who objected to India's mediation of the civil war in Sri Lanka.

The ruling Congress Party lost the parliamentary elections of May 1996, and its waning resulted in a period of political instability. The Hindu nationalist Bharatiya Janata Party (BJP) then became the dominant force in politics, with Atal Bihari Vajpayee as prime minister.

In May 1998, India set off five nuclear tests, surprising the international community, which widely condemned India's prone clear stance. Despite international urging for restraint, Pakistan responded by conducting several nuclear tests of its own two weeks later. India has resisted signing the Comprehensive Test Ban Treaty for nuclear weapons and has been slapped with sanctions by the U.S. and other countries.
The Indian Air Force launched air strikes on May 26, 1999, and later sent in ground troops against Islamic guerrilla forces in Kashmir. India blamed Pakistan for orchestrating violence in Kashmir by sending soldiers and mercenaries across the so-called Line of Control that divides Kashmir between India and Pakistan. In Aug. 1999, Pakistan was forced to withdraw, but fighting continued sporadically during the coming year.
In Oct. 2001, violence again broke out in the region when a suicide bombing by a Pakistan-based militant organization killed 38 in India-controlled Kashmir. Violent clashes between Muslims and Hindus rocked the state of Gujarat in late February and early March 2002 after a Muslim mob fire-bombed a train, killing 58 Hindu activists. Hindus retaliated, and more than 500 people died in the bloodshed.
Hope for a peaceful solution to the conflict in Kashmir was raised Nov. 2002, when a newly elected coalition government in India-controlled Jammu and Kashmir vowed to reach out to separatists and to improve conditions in the state. But hopes were dashed in March 2003, following the slaughter of 24 Hindus in Indian-controlled Kashmir..

In one of the most dramatic political upsets in modern Indian history, the Indian National Congress Party, led by Sonia Gandhi, prevailed in parliamentary elections in May 2004, prompting Prime Minister Atal Bihari Vajpayee to resign. Although the country prospered economically under Vajpayee's rule, a substantial number of India's poor felt they had not benefitted from India's economic growth. Sonia Gandhi, the Italian-born widow of former prime minister Rajiv Gandhi, dealt a further shock to the country when she refused to become prime minister. The BJP had vociferously protested Gandhi's expected elevation to prime minister because of her foreign birth. The Congress Party instead chose former finance minister Manmohan Singh, who became India's first Sikh prime minister.

The Culture of India is one of the oldest in the world [1]. India has managed to preserve its established traditions throughout history whilst absorbing customs, traditions and ideas from both invaders and immigrants. Many cultural practices, languages, customs and monuments are examples of this co-mingling over centuries. In modern India, there is remarkable cultural diversity throughout the country. The South, North, and North-East have their own distinct cultures and almost every state has carved out its own cultural niche. In spite of the diversity, it's bound by a common thread as one civilization perhaps because of its common history. Indian culture and religions had great impact on its immediate neighbours, South East Asia and beyond. Indian influences are still very strong in Thai, Malay, Singaporean, Indonesian, Laotian, Khmer, Burmese, Tibetan, Mongolian cultures and many more. India has been the birth place of many major relegious systems such as Hinduism, Sikhism, Ayyavazhi, Buddhism and Jainism, that are strong and influential not only in India but across the world.