How did Creationism originate?

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