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Reading The Triumph of Christianity at Quail Ridge Books

On Tuesday February 13, 2018 at 7:00pm, I had a book reading based on my new book "The Triumph of Christianity: How A Forbidden Religion Swept the World" at Quail Ridge Books located in Raleigh, North Carolina. I read excerpts for about 30 minutes, then took questions. Here it is, for your viewing pleasure or amusement! Please adjust gear icon for 720p High-Definition: To see all my posts, 5-6 times a week, join the blog! It doesn't cost much, gives a lot, and raises money for charity. So why not?

BDEhrman2025-09-10T12:40:20-04:00March 4th, 2018|Book Discussions, Public Forum, Spread of Christianity, Video Media|

My Interview with Michael Shermer

On Sunday, February 18, 2018, I did a podcast interview with Michael B. Shermer, a well known author on issues related to science and religion (the one I most recently read: The Science of Good and Evil), based on my new book: The Triumph of Christianity: How a Forbidden Religion Swept the World. The interview is part of the Science Salon series, number eighteen. Dialogues are hosted by Michael Shermer and presented by The Skeptics Society, in California. Dr. Michael B. Shermer holds a graduate degree in experimental psychology. He is a historian of science, founder of The Skeptics Society, and editor-in-chief of its magazine Skeptic, which is largely devoted to investigating pseudoscientific and supernatural claims. Shermer engages in debates on topics pertaining to pseudoscience and religion in which he emphasizes scientific skepticism Among other things in this interview we discuss the modern atheism movement, religion and politics, the intractable problem of evil, the early understandings of Jesus (how could he be both man and God?), the beliefs of ancient pagans about the gods and [...]

BDEhrman2025-09-10T12:40:19-04:00February 23rd, 2018|Book Discussions, Public Forum, Spread of Christianity, Video Media|

A Welcome Review of The Triumph of Christianity

It is every author's dream to have a book reviewed in the Sunday New York Times Book Review. I've never had that happen before. Until now. This Sunday The Triumph of Christianity will be reviewed by Tom Bissell, whose writings some of you may know. Most reviews in the NYT bring out both the outstanding features and the shortcomings of the book under consideration. A damning review can be devastating. Rarely is a review all praise. I would say this one is extremely generous and exceedingly gratifying, written by a knowledgeable scholar who "got" the book. You can see it here, with graphics: https://www.nytimes.com/2018/02/13/books/review/bart-d-ehrman-the-triumph-of-christianity.html?rref=collection%2Fsectioncollection%2Fbook-review&action=click&contentCollection=review&region=rank&module=package&version=highlights&contentPlacement=6&pgtype=sectionfront But here is the text of the review itself: ************************************************************** THE TRIUMPH OF CHRISTIANITY How a Forbidden Religion Swept the World By Bart D. Ehrman 335 pp. Simon & Schuster. $28. “I used to believe absolutely everything that Bill just presented,” the scholar Bart D. Ehrman once said during a 2006 debate with the conservative theologian William Lane Craig. “He and I went to the same evangelical Christian college, Wheaton, where these things are taught. … [...]

BDEhrman2025-09-10T12:40:18-04:00February 15th, 2018|Book Discussions, Spread of Christianity|

The Conversion of Constantine

My book comes out tomorrow and I’m very excited! Here is a foretaste of what is in it. This is how I begin Chapter 1, which focuses on the conversion of Constantine. ***************************************************** Few events in the history of civilization have proved more transformative than the conversion of the emperor Constantine to Christianity in the year 312 CE. Later historians would sometimes question whether the conversion was genuine. But to Constantine himself and to spiritual advisors close to him, there appears to have been no doubt. He had shifted from one set of religious beliefs and practices to another. At one point in his life he was a polytheist who worshiped a variety of pagan gods -- gods of his hometown Naissus in the Balkans, gods of his family, gods connected with the armies he served, and the gods of Rome itself. At another point he was a monotheist, worshiping the Christian God alone. His change may not have been sudden and immediate. It may have involved a longer set of transitions than he later [...]

BDEhrman2025-09-10T12:40:01-04:00February 12th, 2018|Book Discussions, Constantine, Fourth-Century Christianity, Spread of Christianity|

Beginning the Triumph of Christianity

I’m in Washington D.C., where I just now gave my first “book talk,” a reading from part of my new book The Triumph of Christianity: How a Forbidden Religion Swept the World, at the wonderful bookstore, “Politics and Prose.” The book is officially published on Tuesday! And for those interested, this is how I begin the Preface, on a personal note before getting to the matter at hand. *************************************************** In my junior year of college I took a course in English literature that made me understand for the first time how painful it can be to question your faith. The course introduced me to poets of the nineteenth century who were struggling with religion. Even though I was a deeply committed Christian at the time, I became obsessed with the work of the great Victorian poet of doubt, Matthew Arnold. Nowhere is Arnold’s struggle expressed more succinctly and movingly than in that most famous of nineteenth-century poems, Dover Beach. The poem recalls a brief moment from Arnold’s honeymoon in 1851. While standing by an open [...]

BDEhrman2025-09-10T12:40:01-04:00February 11th, 2018|Book Discussions, Public Forum, Spread of Christianity|

More on Numbers of Converts

In case you didn’t read the post of yesterday, I include the final two paragraphs here. Skip them if you remember what I said. The issue I’m dealing with is how much and how fast did the Christian church grow over the first four centuries. I would very much like your feedback, and if you’re a numbers person, I would love it if you would check my calculations to see if I’m making any egregious errors. All of this is lifted, again, from a rough draft of ch. 6 of my book on the Christianization of the Roman Empire ****************************************************** Thus it appears that the beginning of the Christian movement saw a veritable avalanche of conversions. Possibly many of these are the direct result of the missionary activities of Paul. But there may have been other missionaries like him who were also successful. And so let’s simply pick a sensible rate of growth, and say that for the first forty years, up to the time when Paul wrote his last surviving letter, the church grew [...]

BDEhrman2025-09-10T12:33:42-04:00June 24th, 2016|Book Discussions, Fourth-Century Christianity, History of Christianity (100-300CE), Public Forum, Spread of Christianity|

Back to the Question of How Many People Converted

I want to return to the question of how quickly the Christian church grew in the first four centuries. This will be part of chapter 6 of my book on the Triumph of Christianity. If you want a fuller background to what I say in this post and the one to follow, see my earlier musings on May 16 of this year, at https://ehrmanblog.org/how-many-christians-were-there/ In two posts I’m going to lay out what I think we can say both about how many people became Christian and at approximately what rate. For those of you who are math whizzes, I would love for you to check my calculations to see if I’m making mistakes. For everyone I would love to hear your comments on my claims and hypotheses. This is a draft of that part of my chapter, with part two to come tomorrow. As you will see, I begin in medias res. *************************************************************** As a result of these considerations, I want to suggest some minor tweaks in the way we understand the rate of Christian [...]

BDEhrman2025-09-10T12:33:42-04:00June 23rd, 2016|Book Discussions, History of Christianity (100-300CE), Spread of Christianity|

How Many Churches? How Many Letters?

In his important and stimulating article, “Christian Number and Its Implications,” Roman historian Keith Hopkins next begins to think about the implications about the size of the Christian church at different periods. One point to emphasize is that there was not simply one church. There were lots of churches in lots of places, and it is a myth to think that they were all one big cohesive bunch. On the contrary, they were often (as we see in our records) often at odds with each other. But even more than that, even within one city – if it was large enough (think Rome or Antioch for example) there would have been more than one church. And why? Because there would have been too many people to meet in one place. The first time we have any evidence of a church “building” – that is, what we today normally think of as a church (the Baptist church on the corner; the Methodist church up the street) – is not until the middle of the third Christian [...]

BDEhrman2025-09-10T12:33:23-04:00May 21st, 2016|History of Christianity (100-300CE), Public Forum, Spread of Christianity|

How Significant Was Early Christianity?

I return now to Roman historian Keith Hopkins’s fascinating and influential article “Christian Number and It’s Implications.” As I pointed out, for the sake of his article, and after checking it out for plausibility, Hopkins accepts the calculations of Rodney Stark that if Christianity started with 1000 believers in the year 40 CE, and ended up being 10% of the empire (60 million believers) by the time of the Emperor Constantine, you would need a growth rate of about 40% per decade, or, as Hopkins prefers putting it 3.4%). Obviously, as I’ve stated, but need to stress again, we cannot be and are not really thinking that there was a steady rate of growth, that every year there was the same percentage of increase. We’re talking big numbers over a long range of time, so the *average* rate of growth is just that, an average. Some years there may have been a loss of numbers, other years a huge spike. So take that as given. But if we *were* talking about a steady rate, there [...]

BDEhrman2025-09-10T12:33:23-04:00May 19th, 2016|History of Christianity (100-300CE), Public Forum, Spread of Christianity|

Playing with the Numbers (of Christians)

I have been musing on the rate of growth of the Christian church during the first three hundred years, and have pointed out some problems with Rodney Stark’s discussion. I won’t go over all that again here. I will say that his argument tends to be very convenient for his … argument. What he points out is that a growth rate over time of about 40% grows the church from about 1000 Christians in the year 40 (that’s a number I find problematic) gets you to about 6 million Christians in the year 300, and that is almost exactly the rate of growth of the Mormon church since it was started in the 19th century. Stark is an expert on the Mormon church, from a sociological perspective; and so it is not surprising that he is particularly drawn to this statistic. But if you crunch the numbers a bit more realistically, there still is sensible set of figures that emerge. If, as the NT actually indicates, Christianity started out with about 20 of Jesus’ followers [...]

BDEhrman2025-09-10T12:33:22-04:00May 17th, 2016|History of Christianity (100-300CE), Public Forum, Spread of Christianity|

How Many Christians Were There?

There are a lot of things that I’m really very interested in that I’m not very good at. As a kid I was passionate about baseball. I was an All Star every year up to high school, but I really wasn’t all that great. I was just better than most of the other kids, who *really* weren’t great. It was a rather low bar. Same with tennis. Same with a lot of things – even into adulthood. As an adult I’ve long had an attraction to numbers, but I’m not very good at them. I’m fascinated by them, but I can’t work out much of any kind of sophisticated mathematical formula to save my soul. That’s why last week I asked for some help on the blog. I needed someone to come up with a formula for me to crunch some numbers. And several people obliged. Many, many thanks to all who helped. I’m very much in their debt. It’s amazing to me the kinds of expertise that are out there. Some of my respondents [...]

BDEhrman2025-09-10T12:33:22-04:00May 16th, 2016|History of Christianity (100-300CE), Public Forum, Spread of Christianity|

The Rate of Christian Growth

I have been discussing the fascinating article by Keith Hopkins, “Christian Number and Its Implications,” about how many people converted to Christianity at certain points of time (say, from ten years after Jesus’ death to the time the emperor Constantine converted in the year 312). As we have seen so far, the first problem Hopkins deals with is how to count – that is, who counts as a Christian? Hopkins takes the (in my opinion) justifiable and sensible view that if someone considered themselves to be a follower of Jesus (whether they were proto-orthodox, or Sethian, or Marcionite, or Ebionite, or anything else) they should be counted. The second problem, as we have also seen, is that our sources don’t give us any reliable statistics, or indeed statistics of any kind. Instead, our sources (and, by the way, without sources we have no evidence, only guess work, even if it is educated guess work) are highly prone to exaggeration. And so the book of Acts indicates that within a couple of months, some 8000 Jews [...]

BDEhrman2025-09-10T12:33:22-04:00May 15th, 2016|History of Christianity (100-300CE), Public Forum, Spread of Christianity|

Christians and their Exaggerated Numbers

I have started discussing the fascinating article by Keith Hopkins, “Christian Number and Its Implications” (see my post of two days ago). After discussing some of the problems with knowing how to “count” Christians (i.e., who counts as a Christian), he reflects for a bit on the problems presented to us by our sources of information. The basic problem is that our sources don’t *give* us much information! No one from the early Christian church was a statistician and no one kept records of how many people were being converted. And the comments we find that are of any relevance turn out to be so broad, generalized, and suspicious as to be of no use to us at all. Sometimes, a source will give numbers, but they clearly cannot be trusted. Take the book of Acts. This is our first account of early Christianity, and, of course, became the “canonical” account. According to Acts 2 (this and the following are examples that *I’m* giving; they are not found in Hopkins), just 50 days after Jesus’ [...]

BDEhrman2025-09-10T12:33:08-04:00May 12th, 2016|Book Discussions, History of Christianity (100-300CE), Spread of Christianity|

Who Counts as a Christian?

To start on my reflections on the rise and spread of Christianity, it might be useful to talk for a while about a particular article that has been highly influential both for my own thinking and more broadly in the contemporary discussion among scholars. The article was written by a prominent and deservedly acclaimed British historian, Keith Hopkins, a long-time professor at Cambridge University. It was called “Christian Number and Its Implication,” and it appeared in the Journal of Early Christian Studies in 1998. Hopkins begins his article by reflecting on the fact that it’s very difficult to know even what we’re talking about when we’re talking about the numerical growth of Christianity. For one thing, what are we going to count as Christianity and whom are we going to count as Christians? Do we count only those who hold to the views that later came to be the dominant understanding of Christianity, for example, that there is only one God, or that Christ was both human and divine at one and the same time, [...]

BDEhrman2025-09-10T12:33:08-04:00May 10th, 2016|History of Christianity (100-300CE), Public Forum, Spread of Christianity|

The Conversion of Constantine and Beyond

I am now nearly finished discussing the Prospectus that I floated before several publishers this past summer for my new book The Triumph of Christianity. My original idea, as you will see below, was to start with the earliest disciples of Jesus, right after his death, who came to think he had been raised from the dead – I’m happy to call them the “first Christians,” even though a lot of scholars object to calling anyone “Christian” until much later; I just don’t have those qualms – and to discuss the spread of Christianity up to the key moment in history, the conversion of the emperor Constantine nearly three hundred years later in the year 312 CE. Constantine’s conversion, in this way of looking at things, was the turning point. After that, the Empire was on the path to becoming Christian. I have since changed my mind and decided to go past Constantine up to the end of the fourth century. But before explaining that, here is how I end my original Prospectus. ***************************************************************** The [...]

BDEhrman2025-09-10T12:33:08-04:00May 4th, 2016|Book Discussions, Fourth-Century Christianity, History of Christianity (100-300CE), Public Forum, Spread of Christianity|

Why Christianity Succeeded

I have been laying out the Prospectus for my proposed book The Triumph of Christianity that I circulated to several publishers last summer, and I am now at the very heart of the matter, the explanation (as I saw it then) for why Christianity succeeded so massively in the Empire during its first three centuries. Here is what I said: ****************************************************************** There were two key factors specific to Christianity that facilitated the growth of the Christian church. These two factors could not be found in other religions of the empire. And in tandem – this is a very important point: they worked in tandem – they led to the spread of Christianity and the demise of all the other religions of the empire. The factors: Christianity was evangelistic and it was exclusivistic. Religions in antiquity were not evangelistic, in part precisely because they were not exclusivistic. A broad survey of ancient writings makes it completely clear: most people did not much care whether you adopted their religious practices or not. No one insisted that you [...]

BDEhrman2025-09-10T12:33:08-04:00May 2nd, 2016|Book Discussions, History of Christianity (100-300CE), Public Forum, Spread of Christianity|

The Early Growth of Christianity

I continue here the brief overview of the book that I’m now working on, The Triumph of Christianity. To this point I have identified the problem that the book is trying to resolve (how Christianity grew from a small group of illiterate Jewish peasants from Galilee to becoming something like 10% of the entire Roman Empire within 300 years), some of the earlier attempts to solve the problem, and one of the fundamental issues involved, the movement from being a Jewish sect to being a gentile religion. Now I get more to the heart of the matter. The first section below talks about how quickly the religion would have had to grow from the time of its founding to become such a large religion by the early fourth century; the next section begins to deal with the issue of how it all happened. Again, this is all lifted directly from my original Prospectus. Whether the book will end up being structured like this is, well, anyone’s guess…. ********************************************************************* The Rate of Growth of the Christian [...]

BDEhrman2025-09-10T12:33:07-04:00April 28th, 2016|Book Discussions, History of Christianity (100-300CE), Public Forum, Spread of Christianity|

From Jewish Sect to Gentile Church

I have been discussing and excerpting the Prospectus I wrote this last summer on my book that I have tentatively titled, The Triumph of Christianity. Here I discuss the beginning of the Christian mission, and how “Christianity” went from being a small Jewish sect to being a large number of gentile communities (with special emphasis on the work of Paul). ************************************************************************* From Jew to Gentile: The Rise of Christianity (two chapters) This section will discuss the very early years of the Christian movement as it shifted from being a sect within Judaism to being a largely gentile religion, all within the space of about 50 years. By everyone’s reckoning, Christianity began among a group of Jesus’ Jewish followers who believed that he was the messiah of God. In this section I will need to provide background to what the term “messiah” meant to ancient Jews. I will not give an extensive account of Jesus’ life and teachings, only enough to show what his overarching message was and how he acquired adherents to that message during [...]

BDEhrman2025-09-10T12:33:07-04:00April 26th, 2016|Book Discussions, History of Christianity (100-300CE), Paul and His Letters, Public Forum, Spread of Christianity|

Roman Religion as the Context for Christianity

I have started to indicate how I laid out my prospectus for my next book The Triumph of Christianity, as I developed the idea this past summer. Remember: the prospectus was designed to get a publisher (or hopefully more than one) interested in publishing the book, and was based on, and presupposed, already a good bit of research. The prospectus was to show what the book was to be about, why it is both interesting and important, and how it would be, tentatively, be laid out. The qualifier, “tentatively,” is very important. The book has to cohere from the outset. But the reality is that as an author does more and more and more research, certain areas of interest emerge more clearly, and the final framing of the book is often quite different from the tentative sketch of the prospectus. Still, it is important to give a publisher a good sense of what the book will look like – what it will argue and how it will argue it. In my previous posts I have [...]

BDEhrman2025-09-10T12:33:07-04:00April 25th, 2016|Book Discussions, Greco-Roman Religions and Culture, Public Forum, Spread of Christianity|

Older Explanations for Why Christianity Succeeded

In yesterday’s post I indicated some of the major issues involved with the question of how Christianity managed to take over the Roman Empire, as spelled out in the Prospectus that I wrote in hopes of finding a publisher interested in signing up my book In this post I’ll give another excerpt from the Prospectus, in which I discuss some of the common answers one can find in books and articles about the matter. How have scholars in the modern world explained the amazing success of the Christian mission? ************************************************************* In modern times one common answer is that Christianity came along at just the right time, when the “pagan” (i.e., polytheistic) religions of the Roman world were on the wane, when people had become sophisticated enough to realize that the ancient Greek and Roman mythologies were simply unbelievable, when people were looking for something more religiously vibrant and sensible. Christianity filled the void, in this view, left by the demise of the Greek and Roman pagan religions. The problems with this answer have been widely [...]

BDEhrman2025-09-10T12:33:07-04:00April 21st, 2016|Book Discussions, History of Christianity (100-300CE), Public Forum, Spread of Christianity|

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