What is fixism?

Fixism is the theory about the diversity of life on earth that affirms that the current existent species were identical to species of the past and came out already adapted to the environment without undergoing alters.

Fixism opposes evolutionism as evolutionism is the idea that current species emerged from gradual transformations suffered by ancestral and extinct species.

The religious version of fixism is called creationism. Many dissimilar forms of creationism are found in the mythology of several religions. Modernized religious interpreters teach creationism as a metaphorical wisdom and not as opposed to evolutionism.