Bhagavad Gita 1-41

saMkarO narakaayaiva kulaGnaanaaM kulasyacha

pataMti pitarO hyEShaaM luptapiMDOdakakriyaaHa || 41 ||

Destruction of Varnas will lead towards hell. Destructors of the families will also demolish their ancestors by not performing the customs of Pindodaka.

Destruction of the Varna system will make life hell. Extinction of clans and dynasties leads to a chaotic situation where families are destroyed. This destruction of family means there are no more family values in the society. When there are no family values the generations to come will not remember their ancestors. They will not perform the valuable customs like offering rice-balls and water to their ancestors. This leads to the downfall of the ancestors too.

The author describes the chaotic situation in the aftermath of the war of such enormity. Majority of the men will be dead or wounded. Choosing able partners from one's own clan or dynasty would be a challenging task. Few elders survive who could guide and enforce or ensure the younger generations follow the family values. Morality, values, righteousness find it difficult to survive in those desperate and chaotic environment. Once family is destroyed the entire civilization is destroyed. Customs and traditions followed by the ancestors will be forgotten and so the history. Any civilization that forgets its own history is dead. Then there is neither future nor value for the past.