A relatively clear and concise explanation of evolution comes from Chris Colby, who, when he wrote Introduction to Evolution in 1996, was a graduate student in biology at Boston University. Highlights:
- Evolution is a change in the gene pool of a population over time.
- Evolution is not progress.
- The mechanisms of evolution are mutation, natural selection, genetic drift, recombination and gene flow.
- Organisms are not passive targets of their environment. Each species modifies its own environment.
- Natural selection does not have any foresight. It only allows organisms to adapt to their current environment. Structures or behaviors do not evolve for future utility.
- An organism adapts to its environment at each stage of its evolution.
Evolution and God
Deistic Evolution
Deistic evolution is the view that ... the universe was created by a God who then makes no further intervention in its affairs. (Source: Wikipedia)
A warmer view comes from Peace Dale Christian Deist Fellowship (whose website appears now to be defunct), via ReligiousTolerance.org:
We believe that God designed and created the world, and governs it through natural laws that can be discovered through reasoning, observation, and experience. We feel that God does not reveal himself to us through inspired or revealed texts or by supernatural means, but through creation itself.
Voltaire presented a rather harsh view of deism through the voice of the Turkish dervish in Candide, in this exchange:
"Master, we come to entreat you to tell us why so strange an animal as man has been formed?"
"Why do you trouble your head about it?" said the dervish; "is it any business of yours?"
"But, Reverend Father," said Candide, "there is a horrible deal of evil on the earth."
"What signifies it," said the dervish, "whether there is evil or good? When His Highness sends a ship to Egypt does he trouble his head whether the rats in the vessel are at their ease or not?"
Theistic evolution
Some definitions:
- The belief that God operates through the natural process of evolution.
- The term "theistic evolution" describes the theistic actions of God (as designer, sustainer, and guider) in evolution, while "evolutionary creation" describes evolution as God's method of creation. I use these terms interchangeably, and for me they have the same meaning. But some who hold this view prefer "evolutionary creation" because it places the emphasis on creation, with evolution describing the type of creation, while "theistic evolution" places the emphasis on evolution, with theistic describing the type of evolution. (Source: Evolutionary Creation)
- Theistic evolution is the proposition that God is in charge of the biological process called evolution. God directs and guides the unfolding of life forms over millions of years. Theistic evolution contends that there is no conflict between science and the Biblical book of Genesis. (Source: Theistic Evolution)
Creationism
WordReference.com defines creationism as the literal belief in the account of creation given in the Book of Genesis; 'creationism denies the theory of evolution of species.
The above definition applies to some Christian creationists. Following are only two of a number of categories of Christian creationists:
- Young-Earth Creationists. Adherents fit the definition provided by WordReference.org above.
- Old-Earth Creationists. There are various sub-categories of old-Earth creationism. Please go here for elaboration. In general, however, each sub-category subscribes to the idea of an ancient Earth, but is still closely allied to a Biblical explanation for the workings of and the diversity of nature.
According to the Discovery Institute's Stephen Meyer, in his 2005 article, Not By Chance:
... the theory of intelligent design holds that there are tell-tale features of living systems and the universe that are best explained by an intelligent cause. The theory does not challenge the idea of evolution defined as change over time, or even common ancestry, but it does dispute Darwin's idea that the cause of biological change is wholly blind and undirected. ...
This Frequently Asked Questions About Intelligent Design, by Mark Hartwig at Access Research Network offers a concise explanation of the scientific basis for the theory of intelligent design. (Mark Hartwig is also affiliated with the Discovery Institute.)