Lineage Factor is the sole power system of One Piece and Imu's real weapon

It goes without saying that DNA(Lineage factor) dictates the difference between races and their abilities. It is also the part of a person that is manipulated when a devil fruit is eaten. Devil fruits are quite literally just devices that alter DNA. A devil fruit users lineage factor can also be extracted and used to duplicate a devil fruit.

All living beings pass on the capacity for haki, which is why all beings continue to have the ability to awaken it. Remember that specific phrasing. Having the capacity to unlock something doesn't mean that you will. Rayleigh explains this. Supreme kings haki is included in this trend, but I'm inclined believe there was patient zero(s) whose lineage factors were affected with something that birthed conquerors haki after the other two had already existed. If conquerors haki is what will defeat the final enemy , i think it adds another layer to inherited will. A "weapon" passed down through the ages , only those on a dangerous path in life are able to grasp it.

There are several panels during marineford about how Luffy showing supreme haki is linked to his dad and is HEAVILY implied that Dragon also wields supreme haki.

I know I'm focusing a lot on conquerors haki but it's only to drive home how important lineage factor is, for my endgame theory that Imu has an ability that can manipulate lineage factors . The body we see may just be an amalgamation of different race traits and abilities. This is why I included this theory under the "Who is Imu" mystery. It may even be this ability that initially created the different races, as Arlong says Fishmen are "evolved" humans. This may have happened as a way to separate people and incite prejudice against each other.

When Yonji said that the science delving into the research of DNA, it was stepping into the realm of God. I try not to throw around the word "foreshadowing" but I think it was a sign that the endgame would be littered with enemies with modified lineage factors to become stronger. Probably directly,so no weakness to water by having to eat a fruit. Even the Seraphim seem like they may be able to use haki. If conquerors haki is included in that, I believe that proves all haki is genetic. . It's kind of a mix of divinity and science, which i do find interesting.