Jewish tradition grapples with this very question in the stories of Seth and Cain, the sons of Adam and Eve.

Now, you might already know the story of Cain and Abel, one of the first and most tragic tales in the Torah. But the narrative doesn’t end there. We're told that the descendants of Cain, well, they didn't exactly turn over a new leaf. The Legends of the Jews recounts how they mirrored Cain's sinfulness and depravity. It’s almost as if the stain of that first murder lingered in their bloodline. They dwelled in the very field of Damascus, the site of Abel's slaying, a constant reminder of their ancestor's transgression.

But what about the line of Seth? Ah, here's where things get interesting. The descendants of Seth initially lived a pious, well-regulated life. They were the "good" family, right? They even settled on the mountains near Paradise itself! Imagine that, a community striving for spiritual purity, close to the source of creation.

But… and you knew there was a "but" coming, didn’t you? Things changed. According to the Legends, around the time of Methuselah, after Adam's death, the Sethites began to lose their way. They became corrupted, falling into the ways of the Cainites. The two lines, once so distinct, began to intermingle. And not in a good way.

The result of these unions? The Nephilim (נְפִילִים), giants, figures of immense power and, tragically, immense wickedness. Their story is a complex one, hinted at in Genesis and elaborated upon in later traditions. These Nephilim, born from the mingling of Sethites and Cainites, are said to have filled the earth with violence and corruption. They were arrogant, claiming a lineage as noble as the Sethites, comparing themselves to princes and noble men.

Ultimately, their sins, their unchecked arrogance and wickedness, were so great that they brought about the mabul (מַבּוּל), the Flood.

So, what’s the takeaway here? It's easy to point fingers at the "bad" families, at the descendants of Cain, and say, "Well, of course, they went wrong!" But the story of Seth reminds us that even those who start on the right path can stray. That vigilance, humility, and a constant striving for righteousness are essential, not just for individuals, but for entire communities. Because, if even the descendants of Seth could fall, what hope do the rest of us have? Perhaps, the story suggests, it's not about where you start, but where you choose to end up.