Creationism is the religious belief that humanity, life, the Earth, and the universe are the creation of a supernatural being, most often referring to the Abrahamic God. As science developed from the 18th century onwards, various views developed which aimed to reconcile science with the Genesis creation narrative. At this time those holding that species had been separately created (such as Philip Gosse in 1847) were generally called "advocates of creation" but they were occasionally called "creationists" in private correspondence between Charles Darwin and his friends. As the creation–evolution controversy developed, the term "anti-evolutionists" became more common, then in 1929 in the United States the term "creationism" first became specifically associated with Christian fundamentalist disbelief in human evolution and belief in a young Earth, though its usage was contested by other groups, such as theistic evolutionists, who believed in various concepts of creation.

Today, the American Scientific Affiliation and the UK-based Christians in Science recognize that there are different opinions among creationists on the method of creation, while acknowledging unity on the Christian belief that God "created the universe." Since the 1920s, literalist creationism in America has contested scientific theories, such as that of evolution, which derive from natural observations of the universe and life. Literalist creationists believe that evolution cannot adequately account for the history, diversity, and complexity of life on Earth. Fundamentalist creationists of the Christian faith usually base their belief on a literal reading of the Genesis creation narrative. Other religions have different deity-led creation myths, while different members of individual faiths vary in their acceptance of scientific findings.

William Sanford "Bill" Nye (born November 27, 1955), popularly known as Bill Nye the Science Guy, is an American science educator, comedian, television host, actor, mechanical engineer, and scientist. He is best known as the host of the Disney/PBS children's science show Bill Nye the Science Guy (1993–1998) and for his many subsequent appearances in popular media as a science educator.

William Sanford Nye was born in Washington, D.C., the son of Jacqueline (née Jenkins; c. 1920–2000), a codebreaker during World War II, and Edwin Darby "Ned" Nye (died 1997), also a World War II veteran whose experience in a Japanese prisoner of war camp led him to become a sundial enthusiast. Nye is a fourth-generation Washington, D.C. resident on his father's side of the family. After attending Lafayette Elementary and Alice Deal Junior High in the city, he was accepted to the private Sidwell Friends School on a partial scholarship, graduating in 1973. He studied mechanical engineering at Cornell University, where one of his professors was Carl Sagan, and graduated with a Bachelor of Science in 1977. He was awarded an honorary doctorate by The Johns Hopkins University in May 2008. In May 2011, Nye was awarded an Honorary Doctor of Science degree from Willamette University where he was the keynote speaker for that year's commencement exercises.

Clinton Richard Dawkins, FRS, FRSL (born 26 March 1941), known as Richard Dawkins, is a British ethologist, evolutionary biologist and author. He is an emeritus fellow of New College, Oxford, and was the University of Oxford's Professor for Public Understanding of Science from 1995 until 2008.

Dawkins came to prominence with his 1976 book The Selfish Gene, which popularised the gene-centered view of evolution and introduced the term meme. In 1982 he introduced an influential concept into evolutionary biology, presented in his book The Extended Phenotype, that the phenotypic effects of a gene are not necessarily limited to an organism's body, but can stretch far into the environment, including the bodies of other organisms.

Dawkins is an atheist, a vice president of the British Humanist Association, and a supporter of the Brights movement. He is well known for his criticism of creationism and intelligent design. In his 1986 book The Blind Watchmaker, he argued against the watchmaker analogy, an argument for the existence of a supernatural creator based upon the complexity of living organisms. Instead, he described evolutionary processes as analogous to a blind watchmaker. He has since written several popular science books, and makes regular television and radio appearances, predominantly discussing these topics. In his 2006 book The God Delusion, Dawkins contends that a supernatural creator almost certainly does not exist and that religious faith is a delusion—"a fixed false belief." As of January 2010 the English-language version has sold more than two million copies and had been translated into 31 languages.