The World (世界, Sekai?) is used to refer to the concept of the planet Earth. The use of the term "world" as by magi usually refers to the universal rules that can be manipulated or taken advantage of by mankind. Others may use "world" to refer to the two distinct Counter Forces of the Earth, Gaia and Alaya-shiki.
Unlike other celestial bodies in the Solar System, there is no clear Aristotle for Earth. The creature closest to being the Aristotle of Earth is Archetype Earth.
The Earth was initially formed from molten magma and gas. Life did not emerge until the inhospitable planet cooled and settled. The creation of the primordial Earth is attributed to the God Ea. This infernal landscape has also become part of the genetic memories of all creatures on Earth, and humans drew from this imagery when they created the concept of Hell.
The time before the modern era is referred to as the Age of Gods (神代, jindai?, Age of Divinities), during which mankind was less populous and Divine Spirits were either more common or more active. This period is marked by a greater proliferation of Phantasmal Species such as the True Ancestors and Gorgons, and greater interaction between gods and mortals. This is the age of heroes and mythology, when rules of mankind and the world were different but this period ended many years ago. Even Magecraft itself is described as being closer to Magic in this era and Caster's abilities reinforce this concept.
The current age is identified as the Age of Man, where the gods disappeared from everyday life and the progressive decline of magecraft began. Satsuki Kurogiri introduced the theory that the decline, beginning toward the end of the Age of Gods, may have come about due to the extinction of the Unified Language, which may have been common during the period. Gilgamesh insinuates that the world was more antagonistic towards humanity in the previous era, noting that even he could not afford to needlessly slaughter people. During that period, humanity was closer to its origin and the power of Alaya was more concentrated, augmenting the weight of each human soul in comparison to modern humans.
The Counter Force (抑止力, Yokushi-ryoku?, "Deterrent Force" in the English localization) is the safety device formed by the collective unconsciousness. The concept of Counter Force is central to Nasuverse, and consists of two components: Gaia and Alaya. Gaia is the will of the World, the planet's intrinsic wish to survive and prosper. Alaya, on the other hand, is the collective unconsicious will of mankind to avoid extinction. As humans are creatures of Earth, Alaya is a component of Gaia. However, as mankind begins to develop independent of nature, it is starting to become independent of the Gaian system. With this divergence, Alaya is no longer aligned with Gaia and potential conflict can result.
Despite being called "the will of the planet/mankind", the Counter Forces bear no emotions. They are described as passive spirals of energy that respond to threats of planet destruction or human extinction. The Counter Forces are always active, constantly steering mankind and the planet away from potential danger. Usually, the Counter Forces act indirectly. For instance, Shiki Ryougi was driven by the Counter Force to eliminate the threat that is Souren Araya, while historically, Joan of Arc is also named as one who was empowered by the Counter Force.
Although Gaia and Alaya are intangible forces of will, each does enlist physical agents to deal with events too threatening to address with indirect intervention. The agents of Gaia are called Beasts of Gaia, which primarily consist of Spirits and creatures of the Earth, examples include True Ancestors and Primate Murder. The agents of Alaya are called Beasts of Alaya, which include human spirits pledging their eternal service to Alaya in return for favours during their life time. Counter Guardians are examples of Beasts of Alaya, and Archer is one of the Counter Guardians.
The Counter Forces have immense power at their disposal. However, only the appropriate amount is unleashed to address a particular event. If the threat possesses an amount of power equal to X, then the Counter Force will deploy an amount of power just enough to snuff out X and eliminate the threat. The amount of power can be as small as nudging individuals into place through "coincidences", but it can also be as great as sinking an entire continent.
The collective unconsciousness of mankind, the drive for survival. Alaya constantly steers mankind away from extinction. It takes central stage in Kara no Kyoukai as the driving force leading to the event in Paradox Spiral.
Usually Alaya interferes indirectly by guiding and empowering an individual to eliminate a threat. Such individuals include Shiki Ryougi (and characters associated with her) and Joan of Arc. When indirect intervention is insufficient, Alaya will deploy the Beasts of Alaya. Counter Guardians are examples of Beasts of Alaya. Archer from Fate Stay Night is a member of the Counter Guardian. The deployment of Counter Guardians is by no means subtle, as the threat will be eliminated with the surround, inflicting much collateral damage. Touko Aozaki hinted that the sinking of Atlantas was the work of Alaya.
Alaya is of particular relevence to magi, as those close to reaching Akasha are deemed threatening by Alaya. Many of them go to extreme length to avoid or hide from Alaya. For instance, Araya Souren attempted to hide his approach to Akasha by containing his experiment in a boundary field close to a Reality Marble, essentially masking his work by internalizing it.
The planet's will to survive. Gaia protects all creatures on Earth, but as mankind becomes independent, Gaia increasingly perceives humans as a source of threat due to their reckless destruction of the environment.
Gaia's response to the human threat is producing beings that can cull or rule mankind. Primate Murder was created to quickly eliminate humans. The True Ancestors are great Faeries modelled after the Crimson Moon, introduced by Gaia to rule over mankind.
It appears Gaia's various attempts will lead to failure, as storylines of several Type Moon works such as Tsukihime, Fate/EXTRA, and Notes depicted Earth either as a planet in distress or already dead.
The future of the planet is undetermined, with many possible outcomes available depending on the conditions present in the parallel worlds. The Mana Depletion of the world of Fate/Extra is caused by the Aylesbury Valesti producing a pole shift that began the depletion of mana. The world of Tsuki no Sango experienced a similar pole shift and the decline of the human race rather than magecraft. The world of Notes died entirely, and humanity still occupied its corpse. Gilgamesh saw a future where, following the wishes of the Çatalhöyük, humanity outgrows the planet and reaches for the light millions of lightyears away.
Tsuki no SangoEdit
Fate/kaleid liner PRISMA☆ILLYAEdit
The parallel world of the Ainsworth family in Fate/kaleid liner PRISMA☆ILLYA has experienced a shift in the axis of the world and the start of the depletion of its magical energy through a cause unknown to humans. This has brought on changes in the environment like abnormal weather and changes to the coastlines, such as Japan experiencing cold weather and snow during the summer. Plant life has declined, causing a decline in the animal life that feeds off the plants, and it has reached the human population as well. The process for the depletion of energy will take several hundred years, and the humans will not last more than ten generations before the world's destruction.
While science will allow humans to prevail in the short term even with the miracles of the world vanishing, the rules of the world being rewritten make it a surety that humans will perish. "Dry spots" are beginning to appear around the world in places where the energy has been completely exhausted, and an unknown particle unlike magical energy is spreading through those areas. Acting as a poison to wipe out everything alive under the current rules of the planet, the current inhabitants cannot exist in the new world. The Ainsworths plan to use the Holy Grail, Miyu Edelfelt, to use the remaining energy on the planet to make humans into beings that can survive in a new world, similar to the A-Rays and Liners of Notes.
Land of Steel (鋼の大地, Hagane no Daichi?), also known as [over count 1999], is the name of the world in the time of Notes. It is not the official name, but a nickname passed down by those who live on the dead planet. The land is no longer able to support life due to the continents being mostly cracked wastelands unable to properly allow for the growth of food, and the atmosphere, covered with gray and sepia clouds, is no longer suitable for animals. Despite these conditions, humanity has lived on by utilizing their developed civic technology. Due to their survival, the planet, not wishing to have beings live on past itself, made a final wish to the other planets to completely wipe out humanity. They responded by sending the Aristoteles, which ravage the Land of Steel in order to fulfill their purpose.
The world is filled with Grain (ジン, Gin?), also known as [grain "Ether"], harmful and unpredictable space dust particles generated from the dead planet. It is harmful to regular humans, who require special medication and machinery to process it, but it has had beneficial effects for A-Rays and Liners. The energy transfer rate of the Gin scattered in atmosphere is incredibly high, and it resulted in a new level of warfare that was never before possible due to the A-Rays and Knight Arms making weapons of the old age useless. The Cloud Sky (空が、昏い, Sora ga, kurai?, The Sky, it's Dark), said to be a barrier created by the Six Sisters to repel the Aristoteles, is a thick layer of clouds that has hidden the sky since the Great War. It covers the Blood Sky (空が、赤い, Sora ga, akai?, The Sky, it's Red), which is completely red rather than blue. This resulted not from pollution, but from the blood of Type Pluto after its destruction in the atmosphere completely covering the sky.
The main inhabitants after the death of the world were the A-rays and the surviving human race. They fought against each other in a conflict called The Great War (大戦, Taisen?), also known as [Babel's Tale], where the A-Rays, under the Six Sisters, wished to rule the world, while the humans fought to survive. Humanity, on the verge of defeat, eventually developed Liners and the Knights to help in their battles, but this did nothing more than further destroy the already dead planet. The war had no victor due to the sudden appearance of the Aristoteles, having arrived to fulfill their goal of wiping out all living beings. Both sides were nearly wiped out, and they started working together to fight against their combined threats. The Aristoteles slowed their activity after the end of the war, but still continue to slowly wipe out the remaining humans. Type Jupiter, Type Venus, and Type Saturn have all been destroyed, which has led for a call to the planets to initiate a final battle with the humans.
 Kara no Kyoukai Special Pamphlet - Encyclopedia: Counter Force [Others] English | Japanese
Counter Force [Others]
The Counter Force here is the safety device formed by the collective unconsciousness.
The prayer to avert the demise of mankind, Alaya.
And the prayer to extend the life of the planet, Gaia.
These are the two aspect of the Counter Force.
Both aspects have the goal of extending the existence of the current World. They will eradicate the factors that threaten to destroy the World at the moment of their occurance.
Since the Counter Force is the unconscious, its appearance draws no attention, and no one will recognize it.
The Counter Force is a formless spiral of power. It adjusts its scale based on the target that needs to be obliterated. The Counter Force will always appear with a status above the target, enough to absolutely secure a victory.
Normally, the Counter Force empowers "a normal person" to remove the factor that can trigger destruction. As a result, these individuals are worshiped as "Heroes".
Individuals who became Heroes through the aspect of Alaya are said to be integrated into Alaya after death. However, the accuracy of this statement is uncertain.
These individuals are also called Counter Guardians. The emphasis here is "Counter", because they have no autonomy and will only activate in response to an event.
 Notes - Land of Steel [over count 1999]
A planet that died. A globe that reached its end. A world where living things can't live.
The name of the world in the present time. It's not its official name, but a nick name passed down between the people who live in the corrupted land. Like the name Land of Steel indicates, a large part of the continent are now wild lands that are torn apart, covered by a tainted gray colored cloud.
Food can't be grown, and the atmosphere is no longer suited for the animals.
To put it in a human species way, a drastic end of a century. But even after the mother planet died, the humans were able to live on with its developed civil technology.
Even the planet's end where people once imagined, couldn't bring an end to mankind.
 Notes - Grain [grain "Ether"]
Space dust. Name given to all the harmful and unpredictable particles generated from the planet that lost its function. Although it is harmful to humans, sometimes it gives an unique effect to their body, and some call it Ether. The Hundred A-rays, Human Species, Knights, are all new species created by this Gin. The energy transfer rate of the Gin scattered in atmosphere is incredible, and it resulted in a new level of warfare that was never possible on this planet.
With A-rays who can take in Gin into their body and Demonic Swords crystallized by Gin, all the weapons of the old age became useless.
 Notes - The Sky, it's Dark. [cloud sky]
Sky covered by clouds. The thick layers of cloud hides the sky since the great war. It doesn't mean the sky is gray; they just can't see the sky.
 Notes - The Sky, it's Red. [blood sky]
The Sky in this world. Above the gray sea of clouds, there is not a blue, but a red sky.
It's not because of a pollution, but from the blood of one of the Aristoteles that appeared near the end of the Great War, Type-Pluto.
In order to not let Pluto enter the planet's atmosphere, the Six Sisters fought it and killed each other at the same time, and its blood covered the whole planet as a result. The gray cloud is said to be a shield that the Six Sisters placed.
Within this red sky, the two Aristoteles that are prevented from entering the planet is floating like fishes that swim in the sea.
 Notes - The Great War [Babel's Tale]
After the death of the planet, there was a war between the survived human race and the Hundred A-rays.
Mankind in order to survive, and the A-rays to rule the world.
Under the Six-Sisters who united the unmassed A-rays, the human race were on the verge of defeat. Near the end of the war, mankind created the Knights and the Human Species, and it further killed the planet that's already dead.
There was no victor to this war. It was interrupted by an intruder that suddenly appeared and nearly wiped out both sides.
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