How did Creationism originate?

Answer 1

The Bible...

People who believe the Bible is a word for word, literal expression of history, believe it shows the world is 5000ish years old and was created in 7 days because that is what the bible says so...

Evidences suggests the earth is millions of years old

The bible actually has 2 creation stories of the world

and a lot of non factual data, but many people don't take it literally. They take it as a figurative book with lessons on how we should act and live our lives

Answer 2

Modern creationism originated in an effort to show evidence that the world was created deliberately, not through random processes. See also:

Creation or Evolution?

Answer 3

The early Christian Church Fathers largely read biblical creation history as an allegory. Martin Luther taught young Earth creationism, that creation took six literal days about 6000 years ago, but at this stage the word 'creationism' was not used to identify this hypothesis.

The term 'creationist' to describe a proponent of creationism was first used in a letter by Charles Darwin in 1856. In the 1920s, the term became particularly associated with Christian fundamentalist movements that insisted on a literalist interpretation of the Genesis creation narrative and likewise opposed the idea of human evolution. These groups succeeded in getting teaching of evolution banned in American public schools, then from the mid-1960s the young Earth creationists promoted the teaching of "scientific creationism" using "Flood geology" in public school science classes as support for a supposedly literal reading of the Book of Genesis.