This article contains spoilers from the Elbaf Arc of One Piece. A large part of it is my own speculation.
Summary
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The people in D are connected to people with a full moon, who settled on the moon and on the ground.
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People D are probably half a month, descendants of the inhabitants of the Moon and Earth.
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The people inherited the advanced technology from Sky races, which led to the creation of the ancient kingdom.
People D have always been massive mysteries in One piece world. Monkey D. Luffy was introduced to the fans at the beginning of the story, and here the fans began to question the meaning of D. One piece Continued, meaning D became even more interesting, as a few other characters with this initial in their name began to appear and, at the same time, characters who are intrigued by the true history of the world have begun to dig in the sense , letter.

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Nico Robin, one of the most important characters in One pieceHe wants to know the meaning of D. So far, only the members of the Roger pirates know what D means and keep it close to their hearts, without revealing their meaning. But, Oda has already revealed some fans' clues and, by dividing the pieces together, one can deduce which is the true meaning of D. More precisely, after I saw Harley, which was revealed to the fans of One piece Chapter 1138, was eventually revealed much more context around D.
People with full moon-thecent flow from Birka
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Their existence on the moon
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How did the world get a single piece
In order to understand the true meaning of the people in D, fans must understand the origin and true importance of people in the full moon or, in other words, the sky, as they are all connected. The Sky races in the One Piece world do not come from Earth. In One piece The world, the earth is called the blue star and is a heavenly body of great importance, but as well as the moon. In fact, the vast majority of the secrets of the world One Piece actually come from the Moon. This month belong to the winged breeds in the world in a play. The three wings of the world were Shandorians, Birkans and Skypians. All of them lived in the city of Birka a lot ago and together, created the automatons. It is possible for the monthly to live there.
The settlement on the ground: the blue star
Finally, the resources began to work dry and had to leave the machines behind and look for new resources. This is when they put their eyes on the blue star. At the descent to the blue star, they sat on different parts of the world. Skypiens sat on a Sky island, called Skypiea, as the fans already know. Birkans created a city called Birka on a Sky island to the north -Skypiea. The lunarians created the city of God above the red line. Finally, Shandorii settled on the blue sea in Jaya.
Birka, the most important of the cities, was finally destroyed by Enel 8 years ago, after consuming Goro Goro No Mi, leaving behind without traces. He then went to Skypeia and declared himself as God.
Although the three winged races of the world settled in different parts of the world, they probably carried with them a huge technological skill and certainly used them to make a great effect on the blue star. This is where the people from D. come in.
People with half a month and Kingdom D
People come from half -month people
It must be clear, first of all, that the truth about people D is not yet known in a single piece. Oda did not come into depth about them, but fans know pieces and pieces of observations and theories. To better understand the concept of D, the moon people are very important and now, after they have already been explained in an idea, we must simply look at Harley and what it states about the three worlds:
The first world
The flames encompassed the country, and people gave up their wishes, touching the forbidden sun. The enslaved and the sun god appeared. The god of the earth was annoyed and together with the snake of the infernal flames, they wrapped the world in death and darkness. They never met again.
The second world
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The breathing was agitated in the void, and the god of the god sent demons. The sun did nothing but spread the fires of war. The people of half a month dreamed, the full moon people dreamed. People killed the sun and became gods, and the god of the sea broke out. They never met again.
The third world
In chaos, there is null. The disturbed shadow remembers the promised day and hears the voice of the fractured month. The God of the Sun dances and laughs, carrying the world to the end of it. The sun will return again and a new dawn will arrive. Certainly, this time, they will meet again.
Undoubtedly, fans could ask what mention of D exists in Harley of the D. The answer is quite simple. People D are the people of half a month. The full moon, as it is obvious, is a circle. Halfmoon is a D. As such, the people of half a month are the people of D. Why they relate to the people on the Moon, it is probably because this are their origins. People in half a month are probably people who are not exactly with pure blood, blood, but half blood. In other words, when the people in the fairy are mating with the people of Star Blue, something that was probably frowning in the world at that time, the descendants were half a month or the people of D., Given that the Shandorians were the ones. that sat on the blue sea, all D – One piece The world, including Luffy, probably has Shandorian blood in the veins. To express it in a even crazier way, Luffy is half foreign to the people of Earth, as is any other D.
The technological skill of D
It should be remembered that the people of the full moon, that is, winged races have carried an extraordinary technological skill. They created a very advanced city birka per month, after all. Through this technological progress was created the ancient kingdom, given that it was extremely advanced compared to the rest of the world. The only problem that Sky races faced was that they had no resources to stay on the Moon, but the Earth was so abundant of resources that they and the people in D Together ended a source of puzzled power, a flame mother . This is confirmed by Vegapunk's own words, which clearly stated that there is a source of puzzled power similar to the sun in the past.
It all revealed when the other countries wanted to destroy the ancient kingdom for their power and advancement and so the empty century war was fought.
A piece is available to be read via media. The series can be officially read by fans and free on Shonen Jump and Manga Plus applications. The launch date for the next chapter of a piece, One Piece 1139, will be February 9, 2025.

One piece
- release date
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October 20, 1999
- Network
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Fuji TV
- DIRECTOR
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Hiroaki Miyamoto, Konosuke Uda, Junji Shimizu, Satoshi Itō, Munehisa Sakai, Katsumi Tokoro, Yutaka Nakajima, Yoshiro Ueda, Kenichi Takeshita, Yoko Ikeda, Ryota Nakamura, Hiroyuki Kakudou, Takiro Imamura, Takiro, Takiro Hate, Thoyiiki, Yûji Endô, Nosomu Shishido, Hidehiko Kadota, Sumio Watanabe, Harume Kosaka, Yasuhiro Tanabe, Yukihiko Nakao, Keisuke Onishi, Junichi Fujise, Hiroyuki Satou
- Writers
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Jin Tanaka, Akiko Inouue, Junki Takegami, Shinzo Fujita, Shouji Yonemura, Yoshiyuki Suga, Atsuhiro Tomioka, Hirohiko Uesaka, Michiru Shimada, Isao Muyama, Takuya Masumoto, Yoichi Takahashi, Momoka Toyoda
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Mayumi Tanaka
Monkey D. Luffy (voice)
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Kazuya Nakai
Roronoa Zoro (voice)
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Akemi Okamura
Nami (voice)
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