Description
Magic is a mysterious, fundamental force that exists in the natural state of the world.
Unlike the other fundamental forces— gravity, electromagnetism, and so on— magic was not always a part of our reality. It was introduced to us during the Eclipse of the 21st century, and has since fundamentally altered the laws of physics in our world. It can be described mathematically as a field, where the values for spacetime are replaced with corresponding values in "realtime" (reality-time). In other words, magic contains energy, possesses momentum, and can be charted over time— but it does not always exist as a physical entity.
Magic has the unique property of responding to action potential, the electrical pulse of cell membranes in living things such as animals, plants, and fungi. Most importantly, it responds to the action potential in the synapses of the human brain. Humans who are in the right state of mind can influence magic to manifest in the physical world, channeling the energy stored in the magical field to influence reality. Humans who have learned to manipulate magic without assistance are known as witches. Otherwise, forces exist within magic that can give humans a push in the right direction— these "assisted" magic-users fall under their own classifications.
After the Eclipse, magic became the most important scientific discovery in human history.