Chandravanshi -- The Lunar Dynasty from Moon to Mahabharata

The Lunar Dynasty begins with adultery. Soma (the Moon god, born from the eyes of the Prajapati Atri) abducted Tara, the wife of Brihaspati (Jupiter, the guru of the gods). A cosmic war erupted -- Brihaspati's allies (the Devas led by Indra) on one side, Soma's allies (Shukracharya and the Asuras) on the other. Brahma himself intervened and ordered Tara returned. But by then she was pregnant. The child born was Budha (Mercury -- not to be confused with Gautama Buddha). Brihaspati rejected the child. Soma claimed him.

Budha married Ila -- who is simultaneously the daughter of Vaivasvata Manu (Solar Dynasty) and a figure who alternated between male and female form through a divine curse/blessing. Their son was Pururava, the first earthly king of the Chandravansha. Through Pururava's legendary love affair with the apsara Urvashi (the subject of Kalidasa's Vikramorvashiyam), the dynasty grew.

From Pururava the line runs: Ayu > Nahusha > Yayati. And at Yayati, the dynasty splits into the two great branches that define Indian epic literature:

YADU branch (from Yayati's eldest son by Devayani): Leads to the Yadavas, and eventually to Vasudeva, Devaki, and Krishna. This is the branch that produced the 8th avatar of Vishnu.

PURU branch (from Yayati's youngest son by Sharmishtha): Leads to Dushyanta, Shakuntala, Bharata (after whom India is named), Kuru, Shantanu, Bhishma, Dhritarashtra, Pandu -- and ultimately to the Pandavas and Kauravas whose war is the Mahabharata.

The Vishnu Purana (Book 4, Chapters 4-20) and the Mahabharata (Adi Parva) provide the complete genealogy. The cosmic chain: Brahma > Atri > Soma > Budha > Pururava > ... > Yayati > Yadu/Puru > Krishna/Pandavas.

For anyone who grew up watching B.R. Chopra's Mahabharat on Doordarshan, or the more recent Star Plus version, or read Amish Tripathi or Devdutt Pattanaik -- every character in those stories traces back to the Lunar Dynasty. Krishna and the Pandavas are distant cousins. Duryodhana and Arjuna are closer cousins. And the entire Mahabharata war is, at its core, a family property dispute within one branch (Puru) of one dynasty (Chandravansha) that began with the Moon god's affair.

King Yayati is the hinge of the entire Lunar Dynasty. His story explains why the Mahabharata happened the way it did.

Yayati had two wives: Devayani (daughter of Shukracharya, the guru of the Asuras) and Sharmishtha (daughter of the Asura king Vrishaparvan). When Shukracharya discovered that Yayati had secretly married Sharmishtha in addition to Devayani, he cursed Yayati with premature old age. But Shukracharya allowed a loophole: Yayati could transfer his old age to any son willing to accept it.

Yayati asked each son. Yadu (eldest, from Devayani) refused. So did Turvasu, Druhyu, and Anu. Only Puru (youngest, from Sharmishtha) agreed to give his youth to his father. Yayati enjoyed a thousand years of youth in Puru's body, then returned it and crowned Puru as king -- even though Puru was the youngest. Yadu was cursed: his descendants would never hold the title of Samrat (emperor).

This curse is why Krishna, despite being the supreme deity incarnate, never sat on a throne. He was kingmaker, not king. He installed others -- Yudhishthira in Hastinapura, Ugrasena in Mathura -- but never ruled himself. The Yadava line was barred from emperorship by Yayati's ancient curse. When people ask why Krishna did not simply become king and solve everything, the answer is genealogical: Yadu's refusal, thousands of years earlier, had consequences.

The Puru line, meanwhile, produced the Bharata dynasty (India = Bharatavarsha), the Kuru dynasty (Kurukshetra = Kuru's field), and ultimately the two warring families: the 100 Kauravas (sons of Dhritarashtra) and the 5 Pandavas (sons of Pandu). Their war -- fought on the sacred ground that Kuru himself had ploughed with a golden plough -- is the Mahabharata.

For a law student studying property disputes in Hindu Succession Act cases, or a business family navigating joint-family partition in Marwari or Gujarati tradition, the Yayati story is the ur-template: the youngest son inherits because he showed loyalty, the eldest is disinherited because he showed defiance, and the family splits into branches that meet again in conflict generations later.