Creationism

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. In its broadest sense, creationism includes various religious views, 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 Use of the term "creationist" in this context dates back to Charles Darwin's unpublished 1842 sketch draft for what became On the Origin of Species, and he used the term later in letters to colleagues.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."

Biblical basis

The basis for many creationists' beliefs is a literal or quasi-literal interpretation of the Book of Genesis. The Genesis creation narratives describe how God brings the Universe into being in a series of creative acts over six days and places the first man and woman in the Garden of Eden. This story is the basis of creationist cosmology and biology. The Genesis flood narrative 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 de-link creationism from the Bible and recast it as science; these include creation science and intelligent design.

Types

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. 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.
The main general types are listed below.

	Humanity	Biological species	Earth	Age of Universe
Young Earth creationism	Directly created by God.	Directly created by God. Macroevolution 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 creationism	Directly created by God.	Directly created by God. Macroevolution does not occur.	Scientifically accepted age. Reshaped by global flood.	Scientifically accepted age.
Progressive creationism	Directly created by God, based on primate anatomy.	Direct creation + evolution. No single common ancestor.	Scientifically accepted age. No global flood.	Scientifically accepted age.
Intelligent design	Proponents hold various beliefs.	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.	Scientifically accepted age.
Theistic evolution	Evolution from primates.	Evolution from single common ancestor.	Scientifically accepted age. No global flood.	Scientifically accepted age.

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, Institute for Creation Research and the Creation Research Society 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 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 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,. 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.
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. 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. 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

Progressive creationism is the religious belief that God created new forms of life gradually over a period of hundreds of millions of years. As a form of old Earth creationism, it accepts mainstream geological and cosmological estimates for the age of the Earth, some tenets of biology such as microevolution as well as archaeology to make its case. In this view creation occurred in rapid bursts in which all "kinds" of plants and animals appear in stages lasting millions of years. The bursts are followed by periods of stasis or equilibrium to accommodate new arrivals. These bursts represent instances of God creating new types of organisms by divine intervention. As viewed from the archaeological record, progressive creationism holds that "species do not gradually appear by the steady transformation of its ancestors; appear all at once and "fully formed."
The view rejects macroevolution, claiming it is biologically untenable and not supported by the fossil record, as well as rejects the concept of common descent from a last universal common ancestor. Thus the evidence for macroevolution is claimed to be false, but microevolution is accepted as a genetic parameter designed by the Creator into the fabric of genetics to allow for environmental adaptations and survival. Generally, it is viewed by proponents as a middle ground between literal creationism and evolution. Organizations such as Reasons To Believe, founded by Hugh Ross, promote this version of creationism.
Progressive creationism can be held in conjunction with hermeneutic approaches to the Genesis creation narrative such as the day-age creationism or framework/metaphoric/poetic views.