Joan of Arc and Science

I recently visited the equestrian statue of Joan of Arc (Jeanne d’Arc) in Strasbourg, France. I have posted a video [https://youtu.be/ahKGTla7E18 ] about what I learned.

Joan of Arc was a peasant girl, aged about 17, when she claimed that the Archangel Michael and Saints Margaret and Catherine had told her that she needed to lead the French troops to victory over England, which at that time (1429) occupied a large portion of what is today France. This was during the Hundred Years’ War, and France was not doing too well. The French troops were under siege in Orléans.

Jeanne must have had a mesmerizing personality, because she convinced the future French King Charles VII that the voices in her head had told her France would prevail and Charles would be king. She was put in charge of the portions of the French army that eventually drove the English away from that siege and some others as well. She was a military heroine—a 17 year old peasant girl. The story did not end so well for her. She started losing battles, and when she was 19 she was put on trial and convicted of heresy. She was burned at the stake in 1431. One of the charges was that, in leading battles, she had worn men’s clothing. Later, a new trial found her not guilty and today she is esteemed as one of the patron saints of France. Everyone has heard about her.

Every artistic depiction of her shows her to be very beautiful. The usual standards of physical beauty, however, is not at all necessary. She would have appeared beautiful to those who believed her divine claims, no matter what she actually looked like.

What this means for us, as we examine the role of religion in human history, is that even the craziest of claims are credible if the person making them is persistent and absolutely convinced of them. She heard the little voices in her head and had not the slightest doubt of their authenticity. Many historians today believe that Jeanne was schizophrenic (the little voices were in her brain) or had Menière’s disease (the little voices were in her inner ear). We do not know. More to the point, she did not know.

Religious claims can be made and believed on no further basis than the assertion of those who make them. No other evidence is needed. Many people claim that there is, in fact, evidence other than assertions that support many religious beliefs, such as Jesus’ resurrection. But such evidence is not necessary to true believers.

Scientific thinking, however, requires that the person making a claim provide evidence that is verifiable to people other than the one making the claim. You can read more about it in my book Scientifically Thinking. This is an important reason that we should depend on science, rather than religious assertion, to guide us in making decisions of worldwide importance—which nearly all of our decisions are these days.