Talk:Nightblood/@comment-28398720-20160601035009/@comment-27794543-20160907233306

HeckRock, interesting theories.
 * One common theory is that the injections were an anti-radiation cure. (While people approached Becca in hazmat suits, she didn't need one.) That would mean all Grounders are descended from injected individuals.
 * Given how improbable all of Becca's work is (single person creates the most-powerful-AI-ever, gives AI the capability to be the most-powerful-hacker-ever (able to hack into multiple countries nuclear launch systems in a matter of minutes), a chip that connects to the brain, the injections, etc.), adding her manufacturing more injections once she's on the ground isn't a stretch.
 * Nighbloods being the result of injections is also a theory. Becca could have already been a nightblood before she injected herself with an anti-radiation cure. We don't actually know what the injections did.
 * Inheritance of nightblood isn't clear. While a strong genetic component is evident, it's unlikely to be direct inheritance. My theory is that all nightbloods are descendants of injected individuals, but not all descendants are nightbloods.
 * We know young children are taken to Polis as soon as they're identified as nightbloods. Add Titus's & Lexa's surprise of a non-Polis-nightblood. Also, the fact that after Ontari's murder spree, the only known nightblood was Luna. That means nightbloods are rare. (If they just choose not to go to Polis, then Titus would know where hundreds of them were. He wouldn't send Clarke to find someone he considers a traitor to the blood.)
 * "Most of the [nightbloods] just haven't bled and don't know it". Nightblood children are easy to identify – like all children, they bleed. They run, they fall, they fight, they have accidents, etc. Add the forest and the warrior culture, the chances that no one realizes a kid is a nightblood is basically nil. Even if the parents hide it, the neighbors won't. The kid is bound to bleed in front of others sooner rather than later. ("who goes around just cutting people just to see blood color of children" – that would be the flamekeeper's scouts. Given their warrior culture, people aren't likely to be worried over a pinprick.)
 * Since Grounders like having all the nightbloods kill each other, it's unlikely that all nightblood children had a nightblood parent. If they did, then all nightbloods would be children of a previous commander or conclave member (thus even easier to find). More likely that it pops up semi-randomly within descendants.