Category Archives: Polemics

How brief was the period in which the Cambrian phyla suddenly appeared?

The Cambrian explosion refers to the sudden appearance of new body plans in the fossil record. ID proponents think that the period is between 5-10 million years at the most. Naturalists want to stretch out the period in which the body plans appear to tens of millions of years. The two sides can’t both be right. What’s the truth?

Evolution News has the answer.

Excerpt:

To establish the length of the most explosive period of innovation within the Cambrian explosion itself, Meyer cites the work of MIT geochronologist Samuel Bowring and his colleagues as well the work of another group led by Smithsonian paleontologist Douglas Erwin. The Bowring-led study showed that (in their words) “the main period of exponential diversification” within the Cambrian lasted “only 5-6 million years” (emphasis added). Meyer explains:

An analysis by MIT geochronologist Samuel Bowring has shown that the main pulse of Cambrian morphological innovation occurred in a sedimentary sequence spanning no more than 6 million years. Yet during this time representatives of at least sixteen completely novel phyla and about thirty classes first appeared in the rock record. In a more recent paper using a slightly different dating scheme, Douglas Erwin and colleagues similarly show that thirteen new phyla appear in a roughly 6-million-year window. (p. 73)

[…][T]ake a look first at the following figure that Bowring and his colleagues included in their definitive 1993 article, published in the journal Science. They use radiometric methods to date the different stages of the Cambrian period, including the crucial Tommotian and Atdabanian stages in which the greatest number of new animal phyla and classes arise. Note that the so-called Manykaian stage of the Cambrian period lasts about 10-14 million years. Note also that the main pulse of morphological innovation didn’t begin during this stage but rather during the Tommotian and Atdabanian — a period that they describe as taking between “5 to 10 million years,” and in a more detailed passage as taking about 5-6 million years.

[…]In the figure above, the Tommotian and Atdabanian stages of the Cambrian period together span only about 5 million years, starting at about 530 and ending about 525 million years ago. Bowring’s figure also depicts the total number of classes and orders present at any given time during the Cambrian period. The biggest increases in morphological innovation occur during the Tommotian and Atdabanian stages. Indeed, during this period the number of known orders nearly quadruples. Moreover, Bowring and his colleagues also make clear that this period corresponds to the main pulse of Cambrian morphological innovation as measured by the number of new phyla and classes that first appear. They note that, while a few groups of animals do arise in the earliest Manykaian stage of the Cambrian, the most rapid period of “exponential increase of diversification,” corresponding to the Tommotian and Atdabanian stages, “lasted only 5 to 6 m.y.”

You can see the figure they are reference in the Evolution News article.

Also, check out these clips that explain the Cambrian explosion:

Part 1:

Part 2:

The first clip features James Valentine, a professor of biology at the University of California who just co-authored a new book on the Cambrian explosion and is not a proponent of intelligent design.

The consensus among scientists regarding the period of time in which the new body plans appear is 5-6 million years. Biologically speaking, that’s a blink of an eye. You aren’t going that kind of complexity and innovation in such a short period of time any more than you can expect to win the lottery by buying 5-6 million tickets when the odds of winning are 1 in a googol (10 to the 100th power – 1, followed by 100 zeroes). You don’t have enough lottery tickets to make winning the lottery likely. Similarly, 5-6 million years is not enough time for naturalistic mechanisms to code brand new body plans from scratch. It would be like trying to research and write a Ph.D thesis during a single lunch hour. It’s just not enough time to produce the amount of information that’s required.

Related posts

New study: men and women have different goals and expectations when cohabitating

Carson Weitnauer shared this fascinating article from the Atlantic, authored by marriage researcher W. Bradford Wilcox. The article discusses the variances between cohabitating men and women regarding goals and expectations.

Excerpt:

According to a new paper from RAND by sociologists Michael Pollard and Kathleen Mullan Harris, cohabiting young adults have significantly lower levels of commitment than their married peers. This aversion to commitment is particularly prevalent among young men who live with their partners.

Pollard and Harris found that the majority of cohabiting young men do not endorse the maximum indicator of relationship permanence: 52 percent of cohabiting men between ages 18 and 26 are not “almost certain” that their relationship is permanent. Moreover, a large minority (41 percent) of men report that they are not “completely committed” to their live-in girlfriends. By contrast, only 39 percent of cohabiting women in the same age group are not “almost certain” their relationship will go the distance, and only 26 percent say they are not “completely committed”. Not surprisingly, the figures above and below also indicate that married women and men are much less likely to exhibit the low levels of commitment characteristic of many cohabiting relationships today.

[…]The only thing worse than being in a relationship for years with an uncommitted person, it would seem, is marrying one. Research by psychologists Scott Stanley and Galena Rhoades, spotlighted in a New York Times op-ed last year, suggests that cohabiting couples are in for trouble when they “slide” into cohabitation and then marriage rather than “decide” to take the same steps. Their work indicates that many couples begin living together without clear expectations, common values, or a shared commitment to one another. And after a time, some of these couples get married, in part because friends, family, and they themselves think it’s the logical next step. But without common values and a shared sense of commitment, the couples who slide into cohabitation and marriage, instead of purposely deciding to deepen their commitment to one another, are more likely to divorce.

Stanley and Rhoades illustrate this point by pointing to the research on cohabitation, engagement, and divorce. Women who cohabit prior to engagement are about 40 percent more likely to divorce, compared to those who do not cohabit. By contrast, couples who cohabit after an engagement do not face a higher divorce risk. Those who cohabit only after engagement or marriage also report higher marital quality, not just lower odds of divorce. Stanley and Rhoades think that “sliders” are more likely than “deciders” to cohabit prior to an engagement, and to have trouble in their marriage if they go on to tie the knot. On the other hand, couples who deliberately choose to move in together after a public engagement or wedding are more likely to enjoy the shared commitment that will enable their relationship to last.

So, given the low levels of commitment and the gender mismatch in expectations often found among today’s cohabiting couples, young men and especially women who aspire to a strong and stable marriage should take caution when considering moving in together.

You can click through the article to see the graphs he is talking about in the excerpt. Highly recommended. It turns out that women cannot just pick a good-looking guy and drift into a commitment by stringing together good days and good experiences. Ladies, let’s be clear. A man who will have recreational premarital sex with you before marriage is not looking for marriage, but recreation. Marriage is a commitment to work hard, be disciplined, be self-sacrificial and to compromise with another person – all in close quarters. When choosing a mate, you need to look for someone who is good at commitments. Not someone who is good at fun.

The ability to have fun with a man is not a good predictor of marital success because fun is unrelated to the things that a man really does in a marriage: protect, provide, and lead on moral and spiritual issues. Similarly, the ability to impress your friends with a man’s appearance or entertainment value does not make a commitment work. What makes a commitment work… is a man who demonstrates that he is good at making plans and achieving goals through discipline and hard work. Marriage requires making plans and achieving goals more than it requires having fun. Recreational premarital sex is about having fun – not making plans and achieving goals. Instead of talking about the next good time with a man, maybe women need to learn to talk about the mechanics of marriage with a man. And talk about the man’s roles in a marraige with a man. And then they need to learn to avoid men who don’t have plans and who aren’t ready to perform those roles. There are plenty of men who are not “bad boys” who do have plans and who are ready to perform traditional male roles.

A final point. I have noticed today that women tend to avoid men who have strong, exclusive views on moral questions and spiritual questions. The minute a man expresses a moral point of view or a theological argument, women tend to want to avoid him. Sometimes they fear rejection from men with definite convictions. Sometimes they resent male leadership. And there are other reasons to avoid strong men. The problem is that a man who has definite moral views is exactly the kind of man who is likely to be trustworthy and predictable in the marriage. And a man who has definite spiritual views is exactly the kind of man who is going to have some sort of overarching plan for the marriage (AND PARENTING) beyond mere pleasure. You wouldn’t choose someone who was guided by hedonism to be your stock broker or your medical doctor, because doing a hard job requires self-sacrifice and discipline. The same rule applies to choosing husbands. Husbands have duties that are typically best performed by moral, spiritual men.

1 Corinthians 15: the earliest source for the basic facts about the life of Jesus

First, the creed – which is found in 1 Corinthians 15:3-8:

3For what I received I passed on to you as of first importance: that Christ died for our sins according to the Scriptures,

4that he was buried, that he was raised on the third day according to the Scriptures,

5and that he appeared to Peter, and then to the Twelve.

6After that, he appeared to more than five hundred of the brothers at the same time, most of whom are still living, though some have fallen asleep.

7Then he appeared to James, then to all the apostles,

8and last of all he appeared to me also, as to one abnormally born.

Almost all historians accept this creed as dating back to within 5 years of the death of Jesus. But why?

Here’s a great article from Eric Chabot, director of Ratio Christi Apologetics Alliance, The Ohio State University to explain why.

Excerpt:

The late Orthodox Jewish scholar Pinchas Lapide was so impressed by the creed of 1 Cor. 15, that he concluded that this “formula of faith may be considered as a statement of eyewitnesses.” (5)

Paul’s usage of the rabbinic terminology “passed on” and “received” is seen in the creed of 1 Cor. 15:3-8:

“For what I received I passed on to you as of first importance: that Christ died for our sins according to the Scriptures, that he was buried, that he was raised on the third day according to the Scriptures, and that he appeared to Peter, and then to the Twelve. After that, he appeared to more than five hundred of the brothers at the same time, most of whom are still living, though some have fallen asleep. Then he appeared to James, then to all the apostles, and last of all he appeared to me also, as to one abnormally born.”

There is an interesting parallel to Paul’s statement in 1 Cor. 15:3-8 in the works of Josephus. Josephus says the following about the Pharisees.

“I want to explain here that the Pharisees passed on to the people certain ordinances from a succession of fathers, which are not written down in the law of Moses. For this reason the party of the Sadducees dismisses these ordinances, averaging that one need only recognize the written ordinances, whereas those from the tradition of the fathers need not be observed.” (6)

As Richard Bauckham notes, “the important point for our purposes is that Josephus uses the language of “passing on” tradition for the transmission from one teacher to another and also for the transmission from the Pharisees to the people.”(7)

Bauckham notes in his book Jesus and the Eyewitnesses: The Gospels as Eyewitness Testimony that the Greek word for “eyewitness” (autoptai), does not have forensic meaning, and in that sense the English word “eyewitnesses” with its suggestion of a metaphor from the law courts, is a little misleading. The autoptai are simply firsthand observers of those events. Bauckham has followed the work of Samuel Byrskog in arguing that while the Gospels though in some ways are a very distinctive form of historiography, they share broadly in the attitude to eyewitness testimony that was common among historians in the Greco-Roman period. These historians valued above all reports of firsthand experience of the events they recounted.

Best of all was for the historian to have been himself a participant in the events (direct autopsy). Failing that (and no historian was present at all the events he need to recount, not least because some would be simultaneous), they sought informants who could speak from firsthand knowledge and whom they could interview (indirect autopsy).” In other words, Byrskog defines “autopsy,” as a visual means of gathering data about a certain object and can include means that are either direct (being an eyewitness) or indirect (access to eyewitnesses).

Byrskog also claims that such autopsy is arguably used by Paul (1 Cor.9:1; 15:5–8; Gal. 1:16), Luke (Acts 1:21–22; 10:39–41) and John (19:35; 21:24; 1 John 1:1–4).

While the word “received” (a rabbinical term) can also be used in the New Testament of receiving a message or body of instruction or doctrine (1 Cor.11:23; 15:1, 3; Gal. 1:9, 12 [2x], Col 2:6; 1 Thess 2:13; 4:1; 2 Thess 3:6), it also means means “to receive from another.” This entails that Paul received this information from someone else at an even earlier date. 1 Corinthians is dated 50-55 A.D. Since Jesus was crucified in 30-33 A.D. the letter is only 20-25 years after the death of Jesus. But the actual creed here in 1 Cor. 15 was received by Paul much earlier than 55 A.D.

[…]Even the co-founder Jesus Seminar member John Dominic Crossan, writes:

“Paul wrote to the Corinthians from Ephesus in the early 50s C.E. But he says in 1 Corinthians 15:3 that “I handed on to you as of first importance which I in turn received.” The most likely source and time for his reception of that tradition would have been Jerusalem in the early 30s when, according to Galatians 1:18, he “went up to Jerusalem to visit Cephas [Peter] and stayed with him fifteen days” (11).

This comment by Crossan makes sense because within the creed Paul calls Peter by his Aramic name, Cephas. Hence, if this tradition originated in the Aramaic language, the two locations that people spoke Aramaic were Galilee and Judea. (12) The Greek term “historeo” is translated as “to visit” or “to interview.” (13) Hence, Paul’s purpose of the trip was probably designed to affirm the resurrection story with Peter who had been an actual eyewitness to the resurrected Christ (1 Cor. 15:5).

I know what you’re thinking. You’re thinking “Hey WK, isn’t John Dominic Crossan that wacky liberal atheist who is on the far-left fringe of historical Jesus scholarship? So wacky, that he actually thought that Secret Gospel of Mark was real, instead of just being a hoax?” Yes, that’s the nutty John Dominic Crossan I mean. The very one.

Here’s a bit more about this early creed from Gary Habermas.

Quote:

(1) Contemporary critical scholars agree that the apostle Paul is the primary witness to the early resurrection experiences. A former opponent (1 Cor. 15:9; Gal. 1:13-14; Phil. 3:4-7), Paul states that the risen Jesus appeared personally to him (1 Cor. 9:1; 15:8; Gal. 1:16). The scholarly consensus here is attested by atheist Michael Martin, who avers: “However, we have only one contemporary eyewitness account of a postresurrection appearance of Jesus, namely Paul’s.”[3]

(2) In addition to Paul’s own experience, few conclusions are more widely recognized than that, in 1 Corinthians 15:3ff., Paul records an ancient oral tradition(s). This pre-Pauline report summarizes the early Gospel content, that Christ died for human sin, was buried, rose from the dead, and then appeared to many witnesses, both individuals and groups.

Paul is clear that this material was not his own but that he had passed on to others what he had received earlier, as the center of his message (15:3). There are many textual indications that the material pre-dates Paul. Most directly, the apostle employs paredoka and parelabon, the equivalent Greek terms for delivering and receiving rabbinic tradition (cf. 1 Cor. 11:23). Indirect indications of a traditional text(s) include the sentence structure and verbal parallelism, diction, and the triple sequence of kai hoti Further, several non-Pauline words, the proper names of Cephas (cf. Lk. 24:34) and James, and the possibility of an Aramaic original are all significant. Fuller attests to the unanimity of scholarship here: “It is almost universally agreed today that Paul is here citing tradition.”[4] Critical scholars agree that Paul received the material well before this book was written.[5]

The most popular view is that Paul received this material during his trip to Jerusalem just three years after his conversion, to visit Peter and James, the brother of Jesus (Gal. 1:18-19), both of whose names appear in the appearance list (1 Cor. 15:5; 7). An important hint here is Paul’s use of the verb historesai (1:18), a term that indicates the investigation of a topic.[6] The immediate context both before and after reveals this subject matter: Paul was inquiring concerning the nature of the Gospel proclamation (Gal. 1:11-2:10), of which Jesus’ resurrection was the center (1 Cor. 15:3-4, 14, 17; Gal. 1:11, 16).

Critical scholars generally agree that this pre-Pauline creed(s) may be the earliest in the New Testament. Ulrich Wilckens asserts that it “indubitably goes back to the oldest phase of all in the history of primitive Christianity.”[7] Joachim Jeremias agrees that it is, “the earliest tradition of all.”[8] Perhaps a bit too optimistically, Walter Kasper even thinks that it was possibly even “in use by the end of 30 AD . . . .”[9]

Indicating the wide approval on this subject, even more skeptical scholars frequently agree. Gerd Ludemann maintains that “the elements in the tradition are to be dated to the first two years after the crucifixion of Jesus. . . . not later than three years. . . . the formation of the appearance traditions mentioned in I Cor.15.3-8 falls into the time between 30 and 33 CE. . . .”[10] Similarly, Michael Goulder thinks that it “goes back at least to what Paul was taught when he was converted, a couple of years after the crucifixion.”[11] Thomas Sheehan agrees that this tradition “probably goes back to at least 32-34 C.E., that is, to within two to four years of the crucifixion.”[12] Others clearly consent.[13]

Overall, my recent overview of critical sources mentioned above indicates that those who provide a date generally opt for Paul’s reception of this report relatively soon after Jesus’ death, by the early to mid-30s A.D.[14] This provides an additional source that appears just a half step removed from eyewitness testimony.

(3) Paul was so careful to assure the content of his Gospel message, that he made a second trip to Jerusalem (Gal. 2:1-10) specifically to be absolutely sure that he had not been mistaken (2:2). The first time he met with Peter and James (Gal. 1:18-20). On this occasion, the same two men were there, plus the apostle John (2:9). Paul was clearly doing his research by seeking out the chief apostles. As Martin Hengel notes, “Evidently the tradition of I Cor. 15.3 had been subjected to many tests” by Paul.[15]

These four apostles were the chief authorities in the early church, and each is represented in the list of those who had seen the resurrected Jesus (1 Cor. 15:5-7). So their confirmation of Paul’s Gospel preaching (Gal. 2:9), especially given the apostolic concern to insure doctrinal truth in the early church, is certainly significant. On Paul’s word, we are again just a short distance from a firsthand report.

(4) Not only do we have Paul’s account that the other major apostles confirmed his Gospel message, but he provides the reverse testimony, too. After listing Jesus’ resurrection appearances, Paul tells us he also knew what the other apostles were preaching regarding Jesus’ appearances, and it was the same as his own teaching on this subject (1 Cor. 15:11). As one, they proclaimed that Jesus was raised from the dead (15:12, 15). So Paul narrates both the more indirect confirmation of his Gospel message by the apostolic leaders, plus his firsthand, direct approval of their resurrection message.

That’s how solid this early creed is – even atheists like Crossan and Ludemann accept it as historically reliable. It’s historical bedrock, as Michael Licona likes to say. This is the stuff that everyone accepts – across the ideological spectrum!