The concept of Yuga and Avatara
The terms Kalpa, Manvantara and Yuga were used by the ancient Hindus to measure time. Accordingly, one Kalpa consisted of 14 Manvantaras and one Manvantara consisted of 71 Mahayugas and one Mahayuga consisted of four Yugas (ages) namely Krita or Sathya Yuga, Treta Yuga, Dvapara Yuga and Kali or Tisya Yuga.
The doctrine of the avataras of Vishnu is one of the most firmly established tenets of Hinduism. In the Bhagavad Gita (IV:7:8), Sri Krishna says that whenever there is decline of virtue and an insurrection of vice and injustice in the world, he will appear from age (yuga) to age for the preservation of the just, the destruction of the wicked and the establishment of virtue.
In Vishnu Purana it is said that Lord Vishnu appears in the form of Kapila and preaches paramajnana in the Krita yuga (period) and in Treta yuga, he assumes the form of an emperor and destroys the wicked people. In Dvapara yuga, he assumes the form of Vyasa and divides the Vedas into four sections and at the end of Kali yuga, he assumes the form of Kalki and restores the vicious to the path of righteousness.
Kali the sinner
The present age is the age of Kali, the sin god who lords over the world. Kali was the 15th son of Kashyapa and after Sri Krishna’s departure to Vaikunta, Kali began to extend his power and influence and religious and moral decline advances rapidly. Sage Markandeya had prophesied about the happenings in Kaliyuga thus: In Kaliyuga all people will be dishonest and their life expectancy will come down. Righteous persons will decrease and sinners will increase. Brahmins would do duties of Shudras and Shudras will become prosperous, Kings will be sinners and merchants will cheat. Rainfall will be less and everywhere there will be murders.
Agni Purana says that in Kaliyuga all people will lose their faith in god and become irreligious. There will be an inter mixture of castes and people will become thieves and evil doers. Barbarians under the guise of rulers will harass the people. At last Vishnu will appear as Kalki, destroy the barbarians and reestablish all those pure customs and morals which are based upon the due observance of the duties prescribed to the castes and the four orders. Thereafter Hari will return to heaven; and the Sathya yuga then again returning, will restore to the world purity, virtue and piety.
Kalki the savior
All Puranas mentioning the various avataras of Vishnu end with Kalki. In this avatara Vishnu will incarnate as Kalki towards the end of Kaliyuga and come riding a white horse, with a drawn sword to destroy the wicked. Kalki was (or will be) born in a village Shambhalagrama to a Brahmin couple, Vishnuyashas and Sumati. He was married to Padmavathi and had two sons, Jaya and Vijaya. Kalki was a military hero and commanded a large army by which he defeated the Mlechchas and the Bauddhas; conquered kingdoms and restored the varnashrama dharma. (About Kalki’s expedition against the Bauddhas, H.C.Norman opines that it may seem strange to find an avatara of Vishnu marching to subdue those who have been converted by Vishnu himself as Buddha).
Inconsistent statements about Kalki
According to the Puranas, Vishnu will be incarnated as Kalki/Kalkin in a village Shambhala and will destroy all Mlechhas, Shudra kings and heretics and will establish dharma, so that Krita age will then be ushered. While the Vayu Purana (58.75-90) and Matsya Purana (144. 50-64) state that it will be Pramati Bhargava who will be the avatara of Vishnu, Vayu Purana (98.104,110) and (99.396-7), Vanaparva (190. 93-97) of Mahabharata and Bhagavata Purana (X.2.16-23) state that Kalkin will become a universal emperor (Chakravartin) of dharmavijayin type and will start the Krita age. In some Puranas, he is referred as Kalki and in some as Kalkin. In some Puranas, he is said to be the son of a Brahmin Vishnu Yashas and in others he is himself styled as Vishnu Yashas. In some texts he is said to have already flourished and in some to incarnate in future.
Kalki identified with historical personalities
While Hindu sources depict Kalki as a savior, Jain sources depict Kalki as a persecutor of Jains. Based on these Jain sources several historians have tried to identify Kalki with historical personalities. K.P.Jayaswal identifies Kalki with Yashodharman, the famous ruler of Malwa while K.B.Pathak identifies Kalkiraja with Mihirkula, the Huna ruler. According to D.R.Mankad, the Kalki referred by Jaina sources is different from the Kalki referred in the Puranas and he identifies Kalki mentioned in Jain works with Pushyamitra Sunga. But H.B.Bhide after critically examining the works of the Jaina authors who have referred to one Kalki or Kalkiraja says that there is absolutely no evidence in their works (which he claims as not trustworthy from the point of view of history) to identify Kalkiraja either with Yashodharman or Mihirkula.
Kalki defeated Sishunaga?
According to D.R.Mankad, Kalki lived in 1986 B.C., and was born in the dominion of Vishakhayupa of the Pradyota dynasty ruling from Avanti. It is said that the latter came to pay his homage to Kalki as soon as he was born. In the view of D.R.Mankad, Kalki was like Chanukya, a practical politician and an accomplished warrior who gathered all the prominent rulers of the day (the rulers of Kashi, Vaishali, Avanti, etc., who had long standing grudge against Magadha), into a confederacy and dealt a crushing defeat to the Magadha king Sishunaga.
Kalki Purana
The Kalki Purana is one of the late Upapurana and it claims to be a continuation of the Bhagavata Purana and to deal with future events and is a purely Vaishnava work. It describes the deeds of Vishnu to be performed at the close of the Kali Yuga when he will be born as Kalki. According to R.C.Hazra, as all the manuscripts of Kalki Purana are in Bengali scripts, this Purana was written in Bengal and is probably a 18th century A.D. work.
Iconography of Kalki
The image of Kalki, according to Vaikhanasagama should have the face of a horse and the body of a man with four hands carrying respectively, the shankha, the chakra, the khadga and the khetaka and should possess a terrific look. According to Agni Purana, Kalki should carry the dhanus and the bana and should ride on a horse.
Development of the concept of Kalkin
According to P.V.Kane it is probable that the dismal accounts of Kaliyuga were put forth in the first centuries of the Christian era when the ancient varnashrama dharma had suffered a great set-back owning to the ascendancy of Buddhism and Jainism and the invasion of foreigners like the Shakas and the Hunas. When Yashodharman defeated the great Huna invader Mihirakula, people believed that the dark ages were at an end and that an era of perfect dharma was at hand. Passages in a prophetic vein were added about the time of Yashodharman to those already existing about the decline of dharma in Kaliyuga. This necessitated that all passages about Kalkin in any work whatever, were put in later than about 530 A.D.
According to Sunil Kumar Singh, the descriptions of the Kali age in the Puranas should be analysed as symptoms of a changing society. The death of an old order, wherein the social relationships weighed heavily in favour of the Brahmins, was a matter of great concern as it inaugurated the beginning of a phase of uncertainty. It was this fear psychosis and a grave concern for the uncertain future that finds full expression in the Kaliyuga descriptions of the Mahabharata and the Puranas.
It can be presumed that the development of the concept of the arrival of Kalkin was due to the yearning of the conservative elements to reestablish their hegemony over the society.
Reference
Vettam Mani- Puranic Encyclopedia, Motilal Banarsidass, 1975
P.V.Kane – History of Dharmashastra, Vol 5, Part I, BORI, Poona, 1958
P.V.Kane – History of Dharmashastra, Vol 5 Part II, BORI, Poona, 1962
P.V.Kane – History of Dharmashastra, Vol 3, second edition,BORI, Poona, 1973
D.R.Mankad – Puranic Chronology, Gangajala Prakashan, Anand, Gujarat, 1951
T.A.Gopinatha Rao – Elements of Hindu Iconography, vol -I, part I, Motilal Banarsidass, New Delhi, 1985
K.P.Jayaswal – The historical position of Kalki and his identification with Yasodharman, The Indian Antiquary, Vol XLVI, July 1917
H.B.Bhide – Is Kalkiraja an historical Personage, The Indian Antiquary, Vol 48, July 1918
K.B.Pathak – New light on the Gupta era and Mihirkula, The Indian Antiquary, Vol XLVII, January 1918
H.C.Norman – The Kalki Avatara of Visnu, Section V – Religions of India and Iran, Transaction of the third International Congress for the History of Religions, Vol -II, Oxford Press.
Sunil Kumar Singh – Studying the Kali Age: Problems of Perspective, Proceedings of the Indian History Congress, Volume 50, 1989