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CALVIN, JOHN. The sixteenth century was a period fraught with change, from the unfolding of the Protestant Reformation to the Copernican Revolution (see Copernicus, Nicolaus). From the sphere of theology to astronomy, the Aristotelian worldview was under pressure. In the midst of newly emerging dynamics for European society and thought, the Reformer John Calvin (1509â64) grew to become one of the most significant and enduring voices of the early modern era. As pastor and lecturer in the city of Geneva for nearly half of his life, Calvinâs theology developed as he preached, lectured, and published copiously. His writings, particularly his Institutes of the Christian Religion, engaged the topic of Christianity and science in a number of notable regards.
Consistent with a medieval mind-set, Calvin regarded the branches of the liberal arts as the âmaidservantsâ of theology, and he cautioned against elevating them to the level of âmistress.â Distinction was, therefore, maintained between knowledge of earthly matters and knowledge of heavenly matters, the latter of which was the greatest wisdom of all to Calvin. By maintaining the fundamental difference between creature and Creator, Calvin denied that human wisdom could ever wholly penetrate the heights of heavenly knowledge in his commentary on 1 Corinthians 1:20: âMan with all his cunning is as capable of understanding by his own powers the mysteries of God as a donkey is capable of understanding a concertâ (Holder 2006, 38).
Scholarship has at points interpreted Calvinâs cautions toward human reason more polemically than he seemingly intended. Although Calvin affirmed that the revealed wisdom of the gospel was greater than all human philosophy and, in fact, was the true foundation of epistemology, this notion did not impede his advocacy of liberal arts learning insofar as that knowledge did not seek pride of place.
Critical to the issue is Calvinâs teaching on the doctrine of the fall, whereby the original sin of Adam rendered human perception of the world distorted and blinded in a hereditary manner though the inherent goodness of creation was never lost. Calvin elevated special revelation by explaining that apart from the âspectaclesâ of Scripture, humanity was susceptible to the traps of idolatry and confusion to the point of inexcusability before God. Yet limited human understanding in no way rendered the universe less of a âmirrorâ of the invisible God or less of a âtheaterâ of Godâs glory, particularly in terms of its beauty and order. Nevertheless, only those with faith rooted in Jesus Christ and grounded in the revelation of Scripture could then rightly perceive the general revelation of God as Creator and truly appreciate the wonder of Godâs providence.
Meanwhile, Scriptureâs role in explaining the natural world is best understood in light of Calvinâs overarching principle of accommodation. Because Scripture is written for the âcommon folkâ so that they might receive a sufficient knowledge of salvation, God accommodates heavenly wisdom according to human capacities much as a ânurseâ communicates to a child. Consequently, Calvin denied that a precise explanation of the natural world is the intention of Scripture; in contrast, Calvin taught that Scripture recounts the world according to common perceptions. Nonetheless, Calvin encouraged unequivocally the advancement of knowledge in terms of astronomy, medicine, and all the natural sciences as an avenue for developing a greater appreciation for Godâs glory and providence as well as for bettering human life.
Due to Calvinâs supportive attitude toward natural philosophy, his fundamental affirmation of the created goodness of creation, and his belief that all truth is a gift of God, scholars have increasingly regarded Calvinâs thought as playing a role in paving the way for the flourishing of the sciences in subsequent centuries.
Jennifer Powell McNutt
BIBLIOGRAPHY AND RECOMMENDED READING
Gamble, Richard, ed. 1992. Calvin and Science. New York: Garland.
Holder, R. Ward. 2006. John Calvin and the Grounding of Interpretation: Calvinâs First Commentaries. Leiden: Brill.
Schreiner, Susan E. 1995. The Theater of His Glory: Nature and the Natural Order in the Thought of John Calvin. Grand Rapids: Baker.
âââ. 2009. âCreation and Providence.â In The Calvin Handbook, ed. Herman J. Selderhuis, 267â75. Grand Rapids: Eerdmans.
Zachman, Randall C. 2009. âThe Beauty and Terror of the Universe: John Calvin and Blaise Pascal.â In Reconsidering Calvin: Current Issues in Theology, 6â34. Cambridge: Cambridge University Press.
CAMBRIAN EXPLOSION. The Cambrian Explosion refers to the relatively rapid increase in the diversity of animals that occurred during the Cambrian geological period a little more than a half billion years ago.
Based on the geological record, most scientists believe that life arose about 3.5 billion years ago. The early cells in the fossil record resemble simple bacteria, and there is no sign of the more sophisticated, multicompartmental cells known as eukaryotes until about 1.8 billion years ago. Roughly 300 million years later, according to fossil findings, multicellular eukaryotes arose, but likely there was little diversification of these cell-colonies until much later. By about 750 million years ago, however, at least eight different groups of multicellular eukaryotes had come into existence (Erwin and Valentine 2013, 4). Evidence for the creation of animals related to modern sponges, as well as others of unidentified affinity, have been found in rocks dated within a geological period known as the Ediacaran at 550 to 575 million years. Rocks of this age also contain beautifully preserved animal embryos. Furthermore, independent molecular evidence suggests the origin of both sponges and cnidarians (a grouping that includes jellyfish) by this time as well.
The Cambrian period is officially dated as beginning 541 million years ago, and it is characterized by the rapid diversification of animals that manifest bilateral symmetry. As the University of Californiaâs Museum of Paleontology website puts it: âThe fastest growth in the number of major new animal groups took place during the second and third stages of the early Cambrian, a period of about 13 million years. In that time, the first undoubted fossil annelids, arthropods, brachiopods, echinoderms, mollusks, onychophorans, poriferans, and priapulids show up in rocks all over the world.â Although 13 million years is not a short time, it is short relative to the length of time that life has existed on earth.
Why animal diversity appeared so rapidly at that time is not known for certain, but there is strong evidence that this was preceded by a period of rapid increase in oceanic oxygen, so many investigators believe this increase may have been an important factor stimulating animal diversification. Furthermore, there is considerable evidence that some of the key genetic information needed to build more sophisticated multicellular organisms was being slowly assembled over the preceding 200 million years.
Interestingly, land plants had a similar âexplosionâ associated with new plant groups and growth forms, but it occurred about 140 million years later during the Devonian geological period. This rapid diversification in terrestrial plants was followed in turn by a rapid diversification in arthropods, like insects.
The history of life is characterized by episodic âmini-explosionsâ in new body forms, and this is often associated with some type of ecological change (e.g., the diversification of mammals that occurred soon after the dinosaurs went extinct). The Cambrian explosion is especially noteworthy though, because the different animal forms that arose at that time were very different from each other, and almost without exception no other major innovation in animal body plan was ever developed again. Today, and apparently for the past 500 million years or so, it appears that genetic changes that modify the embryo in a manner that would bring about a major change in morphology either have not occurred or, if they have, they are less viable and subsequently lost.
One of the current mysteries in biology is what was different at the time of the Cambrian explosion such that genetic change enabled major new body plans to be developed. Although unanswered at this point, it is a question of great interest and active investigation. The mystery associated with the rapidity and uniqueness of the Cambrian explosion has caused many Christians to propose that Godâs design activity is especially apparent during this period of time. Others stress that the entire evolutionary process occurs in response to the creation command and occurs through Godâs ongoing presence. According to this view, one need not look for specific times when science does not yet have an explanation of a phenomenon.
Darrel R. Falk
REFERENCES AND RECOMMENDED READING
Erwin, Douglas, and James Valentine. 2013. The Cambrian Explosion: The Construction of Animal Biodiversity. Englewood, CO: Roberts and Company.
Meyer, Stephen. 2013. Darwinâs Doubt: The Explosive Origin of Animal Life and the Case for Intelligent Design. New York: HarperOne.
CARNAP, RUDOLF. Rudolf Carnap (1891â1970) was a highly influential, German-born analytic philosopher who made important contributions in logic, philosophy of language, and philosophy of science.
Carnap was born in 1891 in what is now Wuppertal, Germany. Just before the outbreak of World War I, Carnap studied philosophy and mathematics at the University of Freiburg and the University of Jena (where he was a pupil of Gottlob Frege). Having finished his military service, Carnap returned to Jena where he completed a dissertation on the philosophical foundations of geometry.
By 1926 he was a member of Moritz Schlickâs (1882â1936) famed Vienna Circle, a group of philosophers and scientists attempting to work out a âscientificâ conception of the worldâwhich in their eyes was equivalent to a scientific materialist worldview. This group of logical positivists is perhaps best known for its verifiability principle, which claimed that all cognitively meaningful statements must be either analytically true (i.e., true in virtue of the meaning of the terms) or empirically verifiable through observations of the senses. Importantly, because they thought they could not be verified by experience, the positivists dismissed the claims of aesthetics, ethics, theology, and traditional metaphysics as meaningless pseudostatements that are neither true nor false. The verification principle has primarily been criticized for not meeting its own criterion: the principle itself is neither analytically true nor empirically verifiable.
In 1931 Carnap took a position at Pragueâs German University. But seeing Europeâs growing darkness, Carnap emigrated to America in 1935. There he influenced many notable philosophers as a professor at the University of Chicago and UCLA.
By 1936 Carnap was arguing that scientific or empirical statements are not subject to verification but to confirmation. Because empirical hypotheses can always be overturned by further sense experience, Carnap thought that they are subject to increasing probabilistic confirmation or disconfirmation (in light of our evidence) rather than verification. Thus began his lifelong pursuit of an adequate inductive logic, a lo...