The evolution model has four key ideas pertaining to the origin of the universe, life, and diverse kinds:
- The world is changing; it is not static. (This was postulated to rebut the concept of fixity of species, a 19th-century Creationary idea that is not part of today's creation model. Here, though, is a brief AiG article explaining the confusion wrought by changing a word's definition midway through a historical period.) This is not disputed by creationary scientists.
- Evolution (lower-case e) is a slow, gradual, continuous process. (However, it may be accelerated by selection.) Again, creationary scientists do not dispute this.
- Common descent means that all form of life have various common ancestors. (To which a creationary scientist would reply: To an extent!)
- The mechanism for the origin of diverse kinds of life, and of life itself from chemicals, is natural selection - neo-Darwinism adds mutations to the mix. More on this later.