The Great Battle of the Righteous
In the battle of Kurukshetra, legend has it that kin fought kin, to the finish, defending what each side thought was righteous. The sons of Pandu pitted themselves against their cousins, the sons of Dritharashtra.
Arranged on the two warring sides were battle-hardened veterans - brothers, uncles, cousins, nephews, grandfathers, and gurus. Even God. Hundreds of noble warriors, teachers, yodhas, and famed charioteers died in this righteous war. In the end, we were blessed 3 things: The Bhagvad Gita, a handful of winners, and one big parallel for making a Will.
When you leave your properties, assets, wealth without a Will, you're sowing the seeds for a Mahabharata. Unwittingly. In this family battle, the chances are Mother will fight Son. Brother will fight Brother. Sister will fight Brother. Entire families may be engaged in a righteous fight to the finish. And like in the Mahabharata, there will be many dead, at least figuratively. But unlike at Kurukshetra, there will be no Gita gifted to the world and posterity because of the battle. Nor can you guarantee that the Lord will be on your side. Nor can you hope that the winners will necessarily be the ones you intended.