Its basic tenet is the natural progression of mankind apart from God. However, if people are progressing naturally, ever advancing and getting better all the time, then they would have no need of Jesus and the cross. The doctrine of evolution destroys the need for the cross, for it says that people can lift themselves up by their own bootstraps and solve their own problems. Thus they do not need Jesus or the cross. Thus while evolution teaches that people are getting better and better and can solve their own problems, creation teaches that people started out from the hand of their Creator perfect, fell from their high estate and desperately need the cross and the relationship with Jesus to lift them up from the mire of sin and restore them to that lost estate.
Evolution is salvation by man's own works and progress.
Creaton says that in order to be saved, people need Jesus, this is salvation by grace. Creation teaches that we were created with a noble heritage in the image of God. Evolution teaches that our lives are controlled by the impersonal forces of accident and chance. Creation teaches us that our future is in the hands of a loving Savior. Evolution teaches that change takes millions of years.