There is a secular atheist version of every religious delusion or error.
Rapture, apocalypse, Ragnarok:doomsday preppers, Y2k, Timewave Zero, Mayan Calendar, singularity, mass extinction events
Healing through Prayer: anti-vaccination
anti-evolution: anti-GMO movement, anti-nuclear movement, climate change deniers, AIDS deniers
Genesis story of creation: ancient astronauts
strange beings: angels and demons, cryptozoology, bigfoot, Loch Ness monster, Chupacabra, Mothman
Pseudoscience:
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Examples of pseudoscience concepts, proposed as scientific when they are not scientific, include: acupuncture, alchemy, ancient astronauts, applied kinesiology, astrology, Ayurvedic medicine, biorhythms, cellular memory, cold fusion,[38] craniometry, creation science, Scientology founder L. Ron Hubbard's engram theory, enneagrams, eugenics, extrasensory perception (ESP), facilitated communication, graphology, homeopathy, intelligent design, iridology, kundalini, Lysenkoism, metoposcopy, N‑rays, naturopathy, orgone energy, Oyagaku, paranormal plant perception, phrenology, physiognomy, qi, New Age psychotherapies (e.g., rebirthing therapy), reflexology, remote viewing, neuro-linguistic programming (NLP), reiki, Rolfing, therapeutic touch, and the revised history of the solar system proposed by Immanuel Velikovsky.
Robert T. Carroll stated in part: "Pseudoscientists claim to base their theories on empirical evidence, and they may even use some scientific methods, though often their understanding of a controlled experiment is inadequate. Many pseudoscientists relish being able to point out the consistency of their ideas with known facts or with predicted consequences, but they do not recognize that such consistency is not proof of anything. It is a necessary condition but not a sufficient condition that a good scientific theory be consistent with the facts."[39]
In 2006, the U.S. National Science Foundation (NSF) issued an executive summary of a paper on science and engineering which briefly discussed the prevalence of pseudoscience in modern times. It said, "belief in pseudoscience is widespread" and, referencing a Gallup Poll,[40] stated that belief in the 10 commonly believed examples of paranormal phenomena listed in the poll were "pseudoscientific beliefs".[41] The items were: "extrasensory perception (ESP), that houses can be haunted, ghosts, telepathy, clairvoyance, astrology, that people can communicate mentally with someone who has died, witches, reincarnation, and channelling".[41] Such beliefs in pseudoscience reflect a lack of knowledge of how science works. The scientific community may aim to communicate information about science out of concern for the public's susceptibility to unproven claims.[41]
http://en.wikipedia.org/wiki/Pseudoscience
Racism in the bible used as a justification for slavery: racism in science (anthropology, craniometry, phrenology, anthropometry, ethnology, polygenism, eugenics) used to justify racism, slavery, the Holocaust, imperialism, apartheid,
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In the United States, scientific racism justified Black African slavery to assuage moral opposition to the Atlantic slave trade. Alexander Thomas and Samuell Sillen described black men as uniquely fitted for bondage, because of their "primitive psychological organization".[57] In 1851, in antebellum Louisiana, the physician Samuel A. Cartwright (1793–1863), considered slave escape attempts as "drapetomania", a treatable mental illness, that "with proper medical advice, strictly followed, this troublesome practice that many Negroes have of running away can be almost entirely prevented". The term drapetomania (mania of the runaway slave) derives from the Greek δραπετης (drapetes, "a runaway [slave]") + μανια (mania, "madness, frenzy")[58] Cartwright also described dysaesthesia aethiopica, called "rascality" by overseers. The 1840 United States Census claimed that Northern, free blacks suffered mental illness at higher rates than did their Southern, enslaved counterparts. Though the census was later found to have been severely flawed by the American Statistical Association, John Quincy Adams, and others, it became a political weapon against abolitionists. Southern slavers concluded that escaping Negroes were suffering from "mental disorders".[59][60]
At the time of the American Civil War (1861–65), the matter of miscegenation prompted studies of ostensible physiological differences between Caucasians and Negroes. Early anthropologists, such as Josiah Clark Nott, George Robins Gliddon, Robert Knox, and Samuel George Morton, aimed to scientifically prove that Negroes were a human species different from the white people species; that the rulers of Ancient Egypt were not African; and that mixed-race offspring (the product of miscegenation) tended to physical weakness and infertility. After the Civil War, Southern (Confederacy) physicians wrote textbooks of scientific racism based upon studies claiming that Black freemen (ex-slaves) were becoming extinct, because they were inadequate to the demands of being a free man — implying that Black people benefitted from enslavement. In 1850 Louis Agassiz commissioned a series of daguerreotypes of slaves of Columbia South Carolina for studying of races
http://en.wikipedia.org/wiki/Scientific_racism
Secularism used to justify social innequality:
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The term social Darwinism is often used to describe the use of concepts of struggle for existence and survival of the fittest to justify social policies which make no distinction between those able to support themselves and those unable to support themselves. Many such views stress competition between individuals in laissez-faire capitalism; but similar concepts have motivated ideas of eugenics, racism, imperialism,[4] fascism, Nazism and struggle between national or racial groups
http://en.wikipedia.org/wiki/Social_Darwinism