I believe in the bloodline of Cain. Have snapped up a few bits and pieces here and there and it's starting to come together. They are the more predatory types of humans. I have a few of those in my familiy, but I'm not one of those. The rest of humans would be the sheep, to their lion.
They are more intelligent and much more powerful. I think they have a stronger nervous system and can channel more power and their brain works at a higher capacity. I also think they have a stronger connection to their higher, and can channel more of their divine self while on earth, and can have higher abilities related to that like psychic abilities and higher creativity.
So the bloodline is considered "sacred", but there's a scientific basis for it rather than just superstition, and considered to have the right to rule the earth. I think they have been the rulers, as they are more suited for it, while the rest of humanity are seen as dumb sheep. They are put into pop culture. Madonna, Marlon Brando, Elizabeth Taylor, Sean Connery, Cara Delevingne, etc. They have the eye of the tiger, or that predatory look.
They are also considered very sexy, especially to women, as they make betters providers/protectors and carry strong survival genes. It's like a primitive attraction women can't help, but they make bad husbands. Two of my uncles were more of that type and had a great old time in their youth. Loved by women and worshipped almost like celebrities, etc. I think we subconsciously have respect for them and recognise them as our rulers.
Well, that's my take on the line of Cain, while you can believe what you like.
