A long time ago, Shuimu had considered the issue of bloodline in this world.

Humans are an intelligent race that dominates the ninja world, so there shouldn't be too many mixed-races with other races.

Even though there are many intelligent extraterrestrial species in the ninja world, the possibility of large-scale interbreeding is extremely small. It is more likely that a few special bloodlines will gradually disappear through dilution from generation to generation.

The ninja world is not a very big world. In theory, humans should form a group where most individuals have similar appearance and qualities.

But strangely, Mizuki did not notice any such signs.

The differences in height, weight and size are fine, and the colorful hair and pupils are not annoying after seeing them for a long time, but what about having a shark face? There are also those with extra arms and legs, horns on their heads, bodies like rubber and noodles, and those who turn into water and air...

Some of these are called bloodline limits.

The bloodlines of foreign races like the Otsutsuki have gradually been integrated into the human race. As long as there is no awakening of bloodline limits or atavism, they will basically not show any differences from ordinary people.

Why is it so difficult to eliminate the differentiated characteristics of human beings, and why is there not even any sign of eliminating the differences?

It was not until Mizuki figured out the impact of the summoning contract provided by Myoboku Mountain on Minato Namikaze and Naruto Uzumaki that Mizuki finally found a clue.

Chakra is the culprit for the diversity of human genetic characteristics in the ninja world.

After all, people like Orochimaru and Mizuki who use biotechnology to actively adjust are only a minority and cannot affect humanity as a whole, but the ubiquitous chakra can do this.

For example, Sakura Haruno, who practiced the chakra control of the tailed beasts and then mastered the Sage Mode, has seen a huge change in the dominant characteristics that her offspring may inherit.

As for mutations caused by other reasons, there are even more. Superficial changes such as hair color, eye color, and skin color are not worth mentioning, but the bloodline limit formed by the change and fusion of chakra properties is not a trivial matter.

Molten Release, Ice Release, Boiling Release, etc., these genetic characteristics accumulate from generation to generation and will form a stable bloodline limit or secret technique family.

"Chakra is subtly accelerating the planning process of mankind! Those who walk in the forefront of mankind and lead the direction are ninjas!"

No wonder the productivity level of this world is not very advanced, but the survival rate of newborns is very high, because the physical fitness of humans in the ninja world far exceeds Mizuki's expectations.

There is also some indirect evidence that large-scale epidemics rarely occur in the ninja world, and there are not many types of fatal diseases for ordinary people.

On the contrary, the probability of extremely talented bloodline ninjas like Uchiha Itachi and Kaguya Kimimaro suffering from incurable congenital diseases is higher.

Chakra is not radioactive radiation, and the probability of inducing adverse mutations is extremely low. As long as ordinary people do not encounter accidents, the impact will be small. However, for ninjas who frequently use chakra to perform ninjutsu, the probability of inducing adverse mutations is much higher.

…

"These are just speculations and supporting evidence. Are there no substantive conclusions?"

Mizuki, who had just returned to the village, received the latest investigation report from his physical clone, Kouji.

"Your mission is to conduct social investigations, not to study human genetic history. Is it worth wasting so much energy on this report?"

Since each entity clone is given a great deal of autonomy, differentiated arrangements will inevitably be made for the assigned tasks.

For example, they fought side by side with Pain's Six Paths not long ago, but usually they do their own things and occasionally cooperate with each other.

Koji is in charge of investigating the social structure and development direction of the ninja world, focusing on the relationship between ninjas and civilians, and the reasons for the separation of ninja villages and the secular society represented by daimyo.

Ever since discovering some unusual signs in the relationship between ninjas and civilians two years ago, Mizuki has been trying to find the reason, but he didn't expect to get such a result after more than two years. It was really disappointing.

"It's not surprising that you think so, but..."

Kouji said seriously.

"These are not meaningless. The core of studying the social nature of the ninja world is to study ninjas. During the past two years of observation, I have always wondered why the ninja world is like this now. Strength, power and status are not matched. Ninjas who possess absolute force have actually lost their secular power. This is not like religious organizations, where the advancement of civilization has led to the weakening of divine power. There are gods in this world, but ninjas who possess extraordinary powers do not have a high status..."

"Um?"

This entry point is interesting.

"So what do you think?"

"I haven't come to a final conclusion yet, but after finishing the report in your hand, I got some inspiration..."

"What is it?"

Mizuki asked with interest.

"We may have been misled by our memories of our past lives! In a world where supernatural powers exist, we cannot apply the social phenomenon that all people are born equal and that requires rules to divide classes."

"Institutions, power, the law of the jungle?"

"It's not something so superficial."

Gongzhi shook his head.

"Power lies within oneself, not in society or weapons."

Kouji's words shocked Mizuki:

"You are denying the meaning of the existence of the ninja world's order. This is more cruel than the law of the jungle, and it is an anti-social statement that is wanton and reckless."

"Am I talking nonsense? Think about it carefully. How did Kaguya Ōtsutsuki cleanse the world and then manage it? How did Nagato collect the tailed beasts and use absolute force to establish a 'kingdom of God' to rule the world? What's the difference between this and Kaguya Ōtsutsuki? Is it because the Ōtsutsuki are outsiders? Or is Nagato more merciful? When did Uchiha Obito and Uchiha Madara take the will of ordinary people in the ninja world to heart? Doing bad things with good intentions is just flattering them. In the final analysis, they are just doing it for their own satisfaction."

"Think about yourself. You don't even trust your clones. You never place the foundation of your power on others, but hold it firmly in your own hands. What would happen if you didn't have the power you have now?"

"Because I am very strong and don't need to rely on anything external, so..."

Shuimu was thoughtful.

"Even without Konoha Village, I still stand at the top of the ninja world. The power belongs to me, and all social systems are just appendages that amplify the influence of power."

"Do you finally understand?"

"Superman and Spiderman who are self-disciplined and willing to abide by the rules of ordinary people are idealized products, and Doctor Octopus doesn't care about these."

The possibility of the existence of multiple unrestrained individual armed forces leading to the current situation of the ninja world is too small. For more than a thousand years, except for the time when Kaguya Otsutsuki and the Six Paths Sage were alive, the ninja world was in war for most of the time...