Creationism is the religious belief that nature, and aspects such as the universe, Earth, life, and humans, originated with supernatural acts of divine creation, and is often pseudoscientific.Gunn 2004, p. 9, "The Concise Oxford Dictionary says that creationism is 'the belief that the universe and living organisms originated from specific acts of divine creation.'" originally published in Creation/Evolution Journal | Volume 6 | No. 2 | Summer 1986. In its broadest sense, creationism includes various religious views,Haarsma 2010, p. 168, "Some Christians, often called 'Young Earth creationists,' reject evolution in order to maintain a semi-literal interpretation of certain biblical passages. Other Christians, called 'progressive creationists,' accept the scientific evidence for some evolution over a long history of the earth, but also insist that God must have performed some miracles during that history to create new life-forms. Intelligent design, as it is promoted in North America is a form of progressive creation. Still other Christians, called theistic evolutionists' or 'evolutionary creationists,' assert that the scientific theory of evolution and the religious beliefs of Christianity can both be true." which differ in their acceptance or rejection of modern scientific concepts, such as evolution, that describe the origin and development of natural phenomena.

The term creationism most often refers to belief in special creation: the claim that the universe and lifeforms were created as they exist today by divine action, and that the only true explanations are those which are compatible with a Christian fundamentalist literal interpretation of the creation myth found in the Bible's Genesis creation narrative. Since the 1970s, the most common form of this has been Young Earth creationism which posits special creation of the universe and lifeforms within the last 10,000 years on the basis of flood geology, and promotes pseudoscientific creation science. From the 18th century onward, Old Earth creationism accepted geological time harmonized with Genesis through gap or day-age theory, while supporting anti-evolution. Modern old-Earth creationists support progressive creationism and continue to reject evolutionary explanations. Following political controversy, creation science was reformulated as intelligent design and neo-creationism.

Mainline Protestants and the Catholic Church reconcile modern science with their faith in Creation through forms of theistic evolution which hold that God purposefully created through the laws of nature, and accept evolution. Some groups call their belief evolutionary creationism. Less prominently, there are also members of the Islamic, Jewish, and Hindu faiths, among others, who are creationists. Use of the term "creationist" in this context dates back to Charles Darwin's unpublished 1842 sketch draft for what became On the Origin of Species, "Since at least the early 1840s Darwin had occasionally referred to 'creationists' in his unpublished writings, but the epithet acquired little public currency." – sketch written in 1842 – "if this had happened on an island, whence could the new forms have come,—here the geologist calls in creationists." and he used the term later in letters to colleagues. In 1873, Asa Gray published an article in The Nation saying a "special creationist" who held that species "were supernaturally originated just as they are, by the very terms of his doctrine places them out of the reach of scientific explanation." "In 1873 Asa Gray described a 'special creationist' (a phrase he placed in quotation marks) as one who maintained that species 'were supernaturally originated just as they are'," –

Biblical basis The basis for many creationists' beliefs is a literal or quasi-literal interpretation of the Book of Genesis. The Genesis creation narratives (Genesis 1–2) describe how God brings the Universe into being in a series of creative acts over six days and places the first man and woman (Adam and Eve) in the Garden of Eden. This story is the basis of creationist cosmology and biology. The Genesis flood narrative (Genesis 6–9) tells how God destroys the world and all life through a great flood, saving representatives of each form of life by means of Noah's Ark. This forms the basis of creationist geology, better known as flood geology.

Recent decades have seen attempts to recast creationism as science instead of solely a Biblical interpretation; these include creation science and intelligent design.Richard F. Carlson, Tremper Longman III, Science, Creation and the Bible: Reconciling Rival Theories of Origins, p.25 These movements have been thoroughly rejected by mainstream science and are considered pseudoscience (see §Philosophic and scientific creationism below).

Diversity among creationists To counter the common misunderstanding that the creation–evolution controversy was a simple dichotomy of views, with "creationists" set against "evolutionists", Eugenie Scott of the National Center for Science Education produced a diagram and description of a continuum of religious views as a spectrum ranging from extreme literal biblical creationism to materialist evolution, grouped under main headings. This was used in public presentations, then published in 1999 in Reports of the NCSE. (original online version, with link to the Creation/Evolution Continuum graphic Other versions of a taxonomy of creationists were produced, and comparisons made between the different groupings. In 2009 Scott produced a revised continuum taking account of these issues, emphasizing that intelligent design creationism overlaps other types, and each type is a grouping of various beliefs and positions. The revised diagram is labelled to shows a spectrum relating to positions on the age of the Earth, and the part played by special creation as against evolution. This was published in the book Evolution Vs. Creationism: An Introduction, and the NCSE website rewritten on the basis of the book version.

Both microevolution and natural selection are accepted to occur by all creationists.

+ General major creationist viewsViewHumanityBiological speciesEarthAge of Universe Young Earth creationism Directly created by God. Directly created by God. Macroevolution between created kinds does not occur.Less than 10,000 years old. Reshaped by global flood.Less than 10,000 years old, but some hold this view only for the Solar System. Gap creationismScientifically accepted age. Reshaped by global flood.Scientifically accepted age. Progressive creationismDirectly created by God, based on primate anatomy.Direct creation + evolution. No single common ancestor.Scientifically accepted age. No global flood. Intelligent designProponents hold various beliefs. (For example, Michael Behe accepts evolution from primates.)Divine intervention at some point in the past, as evidenced by what intelligent-design creationists call "irreducible complexity." Some adherents accept common descent, others do not. Some claim the existence of Earth is the result of divine intervention. Theistic evolution (evolutionary creationism)Evolution from primates.Evolution from single common ancestor.Scientifically accepted age. No global flood.

Young Earth creationism

Young Earth creationists such as Ken Ham and Doug Phillips believe that God created the Earth within the last ten thousand years, with a literalist interpretation of the Genesis creation narrative, within the approximate time-frame of biblical genealogies. Most young Earth creationists believe that the universe has a similar age as the Earth. A few assign a much older age to the universe than to Earth. Young Earth creationism gives the universe an age consistent with the Ussher chronology and other young Earth time frames. Other young Earth creationists believe that the Earth and the universe were created with the appearance of age, so that the world appears to be much older than it is, and that this appearance is what gives the geological findings and other methods of dating the Earth and the universe their much longer timelines.

The Christian organizations Answers in Genesis (AiG), Institute for Creation Research (ICR) and the Creation Research Society (CRS) promote young Earth creationism in the United States. Carl Baugh's Creation Evidence Museum in Texas, United States AiG's Creation Museum and Ark Encounter in Kentucky, United States were opened to promote young Earth creationism. Creation Ministries International promotes young Earth views in Australia, Canada, South Africa, New Zealand, the United States, and the United Kingdom.

Among Roman Catholics, the Kolbe Center for the Study of Creation promotes similar ideas.

Old Earth creationism

Old Earth creationism holds that the physical universe was created by God, but that the creation event described in the Book of Genesis is to be taken figuratively. This group generally believes that the age of the universe and the age of the Earth are as described by astronomers and geologists, but that details of modern evolutionary theory are questionable.

Old Earth creationism itself comes in at least three types:

Gap creationism

Gap creationism (also known as ruin-restoration creationism, restoration creationism, or the Gap Theory) is a form of old Earth creationism that posits that the six-yom creation period, as described in the Book of Genesis, involved six literal 24-hour days, but that there was a gap of time between two distinct creations in the first and the second verses of Genesis, which the theory states explains many scientific observations, including the age of the Earth. Thus, the six days of creation (verse 3 onwards) start sometime after the Earth was "without form and void." This allows an indefinite gap of time to be inserted after the original creation of the universe, but prior to the Genesis creation narrative, (when present biological species and humanity were created). Gap theorists can therefore agree with the scientific consensus regarding the age of the Earth and universe, while maintaining a literal interpretation of the biblical text.Evolution vs. Creationism: An Introduction, Eugenie Scott, pp61-62The Scientific Case Against Scientific Creationism, Jon P. Alston, p24

Some gap creationists expand the basic version of creationism by proposing a "primordial creation" of biological life within the "gap" of time. This is thought to be "the world that then was" mentioned in 2 Peter 3:3–6. Discoveries of fossils and archaeological ruins older than 10,000 years are generally ascribed to this "world that then was," which may also be associated with Lucifer's rebellion.

Day-age creationism

Day-age creationism, a type of old Earth creationism, is a metaphorical interpretation of the creation accounts in Genesis. It holds that the six days referred to in the Genesis account of creation are not ordinary 24-hour days, but are much longer periods (from thousands to billions of years). The Genesis account is then reconciled with the age of the Earth. Proponents of the day-age theory can be found among both theistic evolutionists, who accept the scientific consensus on evolution, and progressive creationists, who reject it. The theories are said to be built on the understanding that the Hebrew word yom is also used to refer to a time period, with a beginning and an end and not necessarily that of a 24-hour day.

The day-age theory attempts to reconcile the Genesis creation narrative and modern science by asserting that the creation "days" were not ordinary 24-hour days, but actually lasted for long periods of time (as day-age implies, the "days" each lasted an age). According to this view, the sequence and duration of the creation "days" may be paralleled to the scientific consensus for the age of the earth and the universe.

Progressive creationism