First Parish Church in Weston

Implications of Galileo and Darwin

Harry Hoehler
Minister Emeritus, First Parish Church in Weston

Presented in the panel
Galileo, Darwin, and God: Anniversary Retrospectives
First Parish Church in Weston
December 6, 2009

I will devote my time this evening to looking at one or two aspects of Galileo’s and Darwin’s thought and the implications their thought has for religion, specifically for our understanding of God.

Galileo was a faithful Roman Catholic all his life. Dr. Whitney has described the trouble Galileo caused for himself when he published The Dialogue Concerning the Two Chief Systems of the World defending the Copernican view that the earth rotated around the sun. Dr. Whitney has also shown how the pope’s advisors convinced him that placing the church’s position in the mouth of Simplicio was a direct attack on the pope personally. Needless to say, there’s no wrath so great as a pope scorned!

As for the secondary charge that Galileo had elevated human science above faith as expressed in the Bible, Galileo had long held that there was no real conflict between science and Scripture if Scripture were properly interpreted. As early as 1613 in a letter to a friend he wrote that the greatest error people made was to look upon Scripture as if it made scientific claims. This happened only when they treated the words of the Bible as literal descriptions of the natural order. Scripture’s words, he believed, were indeed inspired by the Holy Spirit; their purpose was to bring people closer to God and to an understanding of life’s “higher mysteries.” But nature itself was also a sign of God’s handiwork, and it was a function of the human intellect, a gift from God, to unravel nature’s secrets. When Scripture literally understood seems to contradict what the senses tell us, then, to quote Galileo, it is “the task of wise interpreters to find true meanings of scriptural passages that will agree with the evidence of sense experience.” Specifically, the role of the biblical interpreter is to get behind the literal words and see how, to quote Galileo again, they contribute to “the primary purpose of Holy Writ” which is “to worship God and save souls.”

In this regard, Galileo was returning to an earlier view of biblical interpretation held by St. Augustine and a third century church father named Origin. Both men questioned the literal understandings of Scripture. Both argued that much of Scripture made sense when its passages were interpreted spiritually as allegory. In fact in a later letter (1631) defending his interpretation of Scripture Galileo invoked the name and influence of St. Augustine for support. Yet Galileo was tried before the Inquisition for contravening what at the time was taught by the church concerning the stability and non-movement of the earth. The irony in all this, of course, is that today the Roman Catholic Church as well as all mainline Protestant denominations would take their stand with the scientist from Florence and not the 17th century church to which Galileo always remained a loyal son.

Now Darwin! As a scientific description of life advancing from simpler to more complex forms over a very long period of time evolution is true and biblical creationism is false. Natural selection with its emphasis on necessity and chance mutations is a naturalistic description of the laws by which evolution works. I use the word naturalistic here because that is what the scientific method is. It’s a naturalistic description of what takes place in the natural order and how the events of that order are linked causally and in other ways.

Difficulty with this understanding arises when scientists, in this case some evolutionary biologists, become metaphysicians and claim that science is the “arbiter of all knowledge,” in other words, that there is “nothing known beyond what science delivers.” Those who make this claim commit two basic logical but related fallacies. First they beg the question by positing as a self-evident truth the unproved assumption that “science is the arbiter of all knowledge.” Second, they fall into the trap of reductionism. That is, they selectively focus on a single description — in this instance the naturalistic account of evolution — change the description into an explanation and treat it as if it were the total explanation of the evolutionary process. With its claims of exclusivity and its rejection of possible, even compatible explanations, the naturalistic account of evolution moves from its proper place in the realm of science to the realm of philosophical assertion. The assertion is that only scientific or naturalistic explanations are true, an assertion which in itself is beyond the scientific canons of proof; for there is no way such an assertion can be experimentally validated.

Robert Pennock, the philosopher of science, emphasizes a similar point. While acknowledging that “all scientific explanations [by definition] are naturalistic,” he makes it clear that it does not follow from this that “all correct explanations are naturalistic.” It does not follow, for example, that an “appeal to God” as the Creative and Sustaining Reality acting behind and within the evolutionary process is “ruled out.” Quite the contrary! The belief that “God is that without which there would be no evolution at all” is in no way logically incompatible with the naturalistic interpretations of science.

What is required, then, is a rethinking of both evolution and theology.

First, evolution. Martin Nowak, director of the Program for Evolutionary Dynamics at Harvard, argues that cooperation, alongside mutation and natural selection, must be thought of as one of the three “principles of evolution.” From single-celled protozoa to genes to bees to vampire bats to dolphins to chimpanzees to humans, cooperation, what some have called “reciprocal altruism,” both within species and with other species living in a given neighborhood appears to be necessary for species survival. More than that, for some reflecting on this fact, it seems to provide a sign of an overall direction embedded within evolution itself. Linking cooperation with mutation and natural selection Nowak states that “evolution describes the fundamental laws of nature according to which God chose to unfold life.”

Second, theology. What does such a view say about how God relates to evolution? For one thing, it demands that we recognize that God initiates and sustains in existence the evolutionary process while stitching into its fabric what Robert Wright has called the “algorithm of natural selection,” including among living beings the drive toward cooperation and the possibilities of the diverse experimentation that chance offers. This implies that the God pictured here is no divine puppeteer. It implies a voluntarily self-limiting but still an omnipresent God. It implies a continually creating God who nevertheless does not determine every single happening. As such, it implies a God who sets the boundary conditions in which events occur, allows for measures of self-adaptation and self-organization to exist in the created order and is unafraid of novelty. But this is no watchmaker God of 18th century deism who sets the universe in motion and then ignores it. Rather it is a God who continues to create and sustain the networks of interaction that make up the natural order; a God who in this process continues to create beings with self-determining powers of their own; a God who continues to reach out and communicate meaning and direction to people in the depths of their experiences; a God who continues to undergird the long, slow process of evolution in its struggle toward its goal of increased cooperation and deeper harmonious relationships; and a God who continues to trust in that unending and marvelous experiment called creation.

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