What is Intelligent Design?
Intelligent Design (ID) is the hypothesis that a higher intelligence (ex: a god, space aliens, time travellers from the future, etc.) guided the course of evolution. Most often, Intelligent Design refers to a god, typically the Christian/Jewish/Muslim god, YHWH or Allah. In other words, God from the Bible.
ID differs from traditional religions in that proponents recognize that biological evolution is responsible for the development and diversity of life on Earth. It is similar to traditional religions in that it typically posits a supernatural explanation for what guided the evolution of certain species (including humans). In this way, ID is similar to the 4th century BC belief put forward by Plato and Aristotle of a "prime mover," that is, a being which set the natural world in motion.