Prismatism - The Nowveil
Nowveil
The false assumption that the moral and perceptual consensus of one’s own era reflects permanent truth. A person under the Nowveil cannot distinguish between what is believed now and what is true — because the present moment feels self-evidently correct from inside it.
A German citizen in 1938 who accepted the official narrative of Jewish criminality was not stupid. They were Nowveiled. A Southern American in 1850 who believed slavery was the natural order was not necessarily cruel by their own lights.
They were Nowveiled. The Nowveil is the most dangerous of all perceptual barriers because it is invisible by design — you cannot see the veil while you are wearing it. The Wall of Swords is its enforcement mechanism; Presentism is its philosophical error; but the Nowveil is the lived experience of both. The only partial antidote is historical consciousness — the recognition that every era before yours was equally certain of things that turned out to be wrong, which suggests your era is no different.
"Astrology is not a science. There's no mechanism by which the position of planets at the time of your birth could influence your personality." -Neil deGrasse Tyson
"The fact that astrology is taken seriously by otherwise intelligent people is a testament to the power of wishful thinking." - Neil deGrasse Tyson
This is objectively wrong. Neil deGrasse Tyson's dismissal of astrology is not a scientific position. It is a Nowveil — the confidence of a man so thoroughly inside a 300-year-old European materialist paradigm that he mistakes its boundaries for the boundaries of reality itself. When Neil deGrasse Tyson says astrology has no mechanism and is believed only by the wishful, he is not speaking as a scientist. He is speaking as a Babylonian, an Egyptian, a Greek, a Roman, an Islamic mathematician, an Indian Vedic scholar, a Chinese imperial astronomer, and a Mayan calendar priest would have spoken — had any of them ever said something so historically illiterate.
Here’s a working timeline organized by category, going from ancient to modern. The principle throughout is the same: in every era, the educated consensus was certain, and was wrong.
BIOLOGY AND MEDICINE
Spontaneous Generation — believed from Aristotle (4th century BCE) through the 17th century. Maggots came from meat. Mice came from grain. Life generated itself from non-living matter. This was not fringe belief — it was the scientific consensus of the ancient and medieval world, endorsed by Aristotle, accepted by the Catholic Church, taught in universities. Disproved by Francesco Redi in 1668 and conclusively by Louis Pasteur in 1859. Two thousand years of educated certainty, wrong.
Miasma Theory — from ancient Greece through the 1880s. Disease was caused by “bad air” from rotting organic matter. The word malaria literally means “bad air” in Italian. This theory was used to explain cholera, plague, and typhoid. Florence Nightingale believed it. It informed the design of hospitals, the planning of cities, and public health policy for centuries. John Snow proved in 1854 that cholera spread through contaminated water, not air. The medical establishment resisted for decades. Germ theory was not accepted until the 1880s.
Bloodletting — practiced for approximately 2,500 years, from ancient Egypt through the 19th century. The idea that illness resulted from excess blood or imbalanced humors led physicians to drain patients of blood as standard treatment. George Washington was likely killed by his doctors bleeding him for a throat infection in 1799. This was not quackery — it was the medical consensus of the most educated practitioners available.
Humoral Theory — from Hippocrates (5th century BCE) through the Renaissance. The body was governed by four humors: blood, phlegm, yellow bile, black bile. Personality, disease, and mental state all resulted from their balance. Every physician in the Western world operated on this framework for roughly 2,000 years.
Lobotomy as psychiatric treatment — the prefrontal lobotomy was developed in 1935 and its inventor Egas Moniz received the Nobel Prize in Medicine in 1949. Tens of thousands of people were lobotomized in the United States alone through the 1950s. Walter Freeman performed them in his office with an ice pick. This was mainstream psychiatry within living memory.
Thalidomide as safe for pregnancy — approved in the late 1950s across Europe and prescribed to pregnant women for morning sickness. Caused severe birth defects in approximately 10,000 children. The FDA’s resistance to approving it in the United States was at the time considered bureaucratic obstruction.
Stomach ulcers caused by stress — medical consensus through the 1980s. Barry Marshall and Robin Warren identified H. pylori bacteria as the cause in 1984. The medical establishment rejected the finding so thoroughly that Marshall drank a petri dish of the bacteria to prove his point. He developed gastritis. They received the Nobel Prize in 2005.
Homosexuality as mental illness — listed in the DSM as a diagnosable disorder until 1973. Treated with electroconvulsive therapy, chemical castration, and aversion therapy within living memory.
ASTRONOMY AND PHYSICS
Geocentrism — from Aristotle and Ptolemy through the 16th century. The Earth was the center of the universe. The Sun, Moon, planets, and stars orbited around it. This was not only religious doctrine but the scientific consensus of the Greek, Roman, Islamic, and medieval European intellectual traditions. Ptolemy’s mathematical model was sophisticated enough to predict planetary positions with reasonable accuracy — and still completely wrong about the fundamental structure of the solar system.
The static universe — Einstein himself initially believed the universe was static and eternal, adding a cosmological constant to his equations specifically to prevent them from predicting an expanding universe. When Hubble proved expansion in 1929, Einstein called the cosmological constant his greatest blunder.
The indivisibility of the atom — the atom was considered the fundamental indivisible unit of matter from Democritus through the 19th century. The word atom means “uncuttable” in Greek. The electron was discovered in 1897, the nucleus in 1911, the proton in 1919.
Continental drift as fringe science — Alfred Wegener proposed that continents moved in 1912. The geological establishment dismissed it as fantasy for decades. Plate tectonics was not accepted as mainstream science until the 1960s. Wegener died on an expedition in 1930 professionally discredited.
Newtonian mechanics as complete — at the end of the 19th century Lord Kelvin famously declared that physics was essentially finished, with only minor details remaining. Within a decade Einstein had published special relativity and quantum mechanics had been born, revealing that Newtonian mechanics was an approximation that broke down at high velocities and small scales.
ANTHROPOLOGY AND RACE
Polygenism — the 18th and 19th century scientific consensus that different human races were literally different species with different origins. This was not the position of cranks. It was defended by leading naturalists, physicians, and scientists and used to justify slavery and colonialism.
Phrenology — the reading of skull shape to determine character, intelligence, and moral capacity. Developed by Franz Joseph Gall around 1800, it was practiced and taught in universities across Europe and America through the late 19th century. Used extensively to “scientifically” justify racial hierarchies.
Eugenics — the selective breeding of humans to improve the species was mainstream science in the early 20th century. The American Eugenics Society had chapters at major universities. Forced sterilization laws existed in 32 U.S. states. The Supreme Court upheld forced sterilization in Buck v. Bell in 1927. Oliver Wendell Holmes wrote the majority opinion. Indiana passed the first eugenics law in 1907. This was not Nazi Germany. This was American scientific consensus.
Scientific racism broadly — the measurement of skulls, the ranking of races by intelligence, the assertion of European biological superiority — all were mainstream academic disciplines with journals, professorships, and institutional support through much of the 19th and early 20th centuries.
NUTRITION AND CHEMISTRY
Fat causes heart disease — the diet-heart hypothesis promoted by Ancel Keys from the 1960s onward became the foundation of dietary guidelines in the United States and globally. Low-fat diets were recommended by every major health institution for decades. The role of sugar was actively suppressed by the Sugar Research Foundation funding studies that redirected blame to fat. The science has substantially reversed since 2010.
Smoking as harmless or beneficial — tobacco companies funded research through the mid-20th century asserting cigarettes were safe. Doctors appeared in cigarette advertisements. The link between smoking and lung cancer was established in the 1950s and actively contested by industry-funded science for decades afterward.
Margarine over butter — hydrogenated vegetable oils were promoted as healthier than animal fats for most of the 20th century. Trans fats, which margarine contains, are now known to be among the most harmful substances in the food supply.
Radium as health supplement — in the early 20th century radium was added to toothpaste, water, chocolate, and patent medicines and marketed as an energizing health tonic. Eben Byers, a prominent American socialite, drank a bottle of radium water daily for years on a doctor’s recommendation. His jaw fell off. He died in 1932.
THE STRUCTURAL ARGUMENT
The pattern across all of these is identical. In every case:
The consensus was held with complete confidence by educated people using the best available methods. Dissenters were ridiculed, professionally destroyed, or ignored. The consensus was eventually overturned not by the establishment but by individuals willing to follow evidence against institutional resistance. After the reversal, the old consensus was reframed as obvious ignorance — as though no reasonable person could have believed it.
This is the Nowveil operating across history. The question is never whether your era has a Nowveil. It always does. The question is which of your era’s certainties will look like bloodletting to people two hundred years from now.
Tyson’s dismissal of astrology is a candidate.