a bonobo humanity?

The human species is monogamous – isn’t it? Isn’t the bonding of a male and a female to produce a large or small brood the typical mode of human being? And yet our closest living relatives aren’t monogamous, and as to our more recent ancestors and their relatives – who knows?

A couple of years ago I read Joseph Henrich’s fascinating book The WEIRDest people in the world: How the West became Psychologically Peculiar and Particularly Prosperous – a serious ethnographic work in spite of the title. So, ‘WEIRD’ stands for the Western, Educated, Industrial, Rich and Democratic regions of the world, so just think about whether your region fits the pattern. I have to admit, my region does, though the ‘particularly prosperous’ bit makes me feel like a bit of a failure.

But it’s the ‘psychologically peculiar’ stuff that most interests me. On page 156 of his book Henrich presents data from ‘the Ethnographic Atlas, an anthropological database of over 1200 societies (ethnolinguistic groups) that captures life prior to industrialisation.’ He doesn’t date ‘industrialisation’, but let’s say prior to the eighteenth century. He describes five kinship traits typical of WEIRD societies, and the degree to which these traits existed in earlier times. 

1. Bilateral descent – relatedness is traced (roughly) equally through both parents  – 28%
2. Little or no marriage to cousins or other relatives – 25%
3. Monogamous marriage – people are permitted to have only one spouse at a time  – 15%
4. Nuclear families – domestic life is organised around  married couples and their children  – 8%
5. Neolocal residence – newly married couples set up a separate household – 5%

It’s important to take these findings in, as we tend to consider current norms as more or less eternal. And it would be impossible for me to summarise Henrich’s analysis in his 500+ page book, but one factor that forcibly struck me was the impact of the Church (as the Catholic Church was known since its inception in the fourth century CE until the Reformation in the sixteenth century) in laying the foundations of Western European WEIRDness, and that of its colonies in the Americas and here in Australia. Here’s how Henrich puts it:

… between about 400 and 1200 CE, the intensive kin-based institutions of many European tribal populations were slowly degraded, dismantled, and eventually demolished by the branch of Christianity that evolved into the Roman Catholic Church – hereinafter the Western Church or just the Church. Then, from the ruins of their traditional social structures, people began to form new voluntary associations based on shared interests or beliefs [aka friendships] rather than on kinship or tribal affiliations.

So, monogamous male-female relations and nuclear families were pushed by the Church quite relentlessly for centuries, and this has had a massive impact, which most people, including myself, have had little awareness of. Henrich and his team (I’m assuming he had a whole team working on this massive project) produced a summary of the changes that have occurred from the fourth century onwards, mostly at the behest of the Church. He calls it the Marriage and Family Program (MFP). I’m going to copy the whole thing out here, if only for my own sake, because it’s quite mind-bending, and some of the most fascinating historical material I’ve ever read: They are ‘prohibitions and declarations on marriage from the Church and secular rulers’, with the years given in bold: 

305-6 – Synod of Elvira (Granada, Spain) decrees that any man who takes the sister of his dead wife as his new wife (sororate marriage) should abstain from Communion for five years. Those marrying their daughters-in-law should abstain from Communion until near death.

315 – Synod of Neocaesarea (Turkey) forbids marrying the wife of one’s brother (levirate marriage) and possible sororate marriage.

325 – Council of Nicaea (Turkey) prohibits marrying the sister of one’s dead wife as well as Jews, pagans and heretics.

339 – The Roman Emperor Constantius prohibits uncle-niece marriages, in accordance with Christian sentiments, and imposes the death penalty on violators. 

384/7 – The Christian Roman Emperor Theodosius reaffirms prohibitions against sororate and levirate marriages and bans first cousin marriage. In 409, the Western emperor Honorius softens the law by allowing dispensations. It is not clear how long this persisted in the West. The dissolving Western Empire makes continued enforcement unlikely. 

396 – The Eastern Roman Emperor Arcadius (a Christian) again prohibits first cousin marriage, but without the harsh penalties. In 400 or 404, however, he changes his mind, making cousin marriage legal in the Eastern Empire.

506 – Synod of Agde (France, Visigoth Kingdom) prohibits first and second cousin marriage, and marriage to a brother’s widow, wife’s sister, stepmother, uncle’s widow, uncle’s daughter, or any kinswoman. These are defined as incest. 

517 – Synod of Epaone (France or Switzerland, Burgundian Kingdom) decrees that unions with first and second cousins are incestuous and henceforth forbidden, although existing unions are not dissolved. The synod also forbids marriage to stepmothers, widows of brothers, sisters-in-law, and aunts by marriage. Many subsequent synods in the area of what would become the Carolingian Empire refer to this synod for incest regulations. 

527/31 – Second synod of Toledo (Spain) prescribes excommunication for all engaged in incestuous marriages. The number of years of excommunication should equal the number of years of the marriage. This is affirmed by synods in 535, 692 and 743. 

538 – First documented letter between a Frankish king and the pope is about incest (marriage to the wife of a deceased brother). The pope disapproves, but he leaves decisions about Penance to the bishops. 

589 – Reccared I, the Visigothic King (Spain), decrees the dissolution of incestuous marriages, punishing offenders with exile, and the transfer of their property to their children.

596 – The Frankish King Childebert II decrees the death penalty for marriage to one’s stepmother but leaves the punishment of other incest violations to the bishops. If the convicted resists the Church’s punishment, his property will be seized and redistributed to his relatives (creating incentives to report violators).

627 – Synod of Clichy implements the same punishment and enforcement procedures as those decreed by King Childebert II in 596. A systematic collection of incest legislation is compiled around this time and becomes part of the Collectio vetus Gallica, the collection of canons from Gaul.

643 – Lombard laws of Rothari forbid marriage to one’s stepmother, stepdaughter and sister-in-law. 

*692 – At the synod of Trullo (Turkey), the Eastern Church finally forbids marriage to one’s first cousins and corresponding affinal kin. This prohibits a father and a son marrying a mother and a daughter or two sisters, and two brothers marrying a mother and a daughter or two sisters. 

721 – Roman Synod (Italy) prohibits marriage to one’s brother’s wife, niece, grandchild, stepmother, stepdaughter, cousin, godmother, and all kinfolk, including anyone ever married to any blood relative. In 726, Pope Gregory II specifies that for missionary purposes the prohibitions are up to first cousins, but for others the prohibitions extend to all known relatives. His successor, Gregory III, clarifies this prohibition such that marriages of third cousins are allowed but marriages to all affinal kin with the prohibited degree are not. These decisions are widely disseminated. 

*741 – Under the Byzantine Emperor Leo III, the prohibitions in the Eastern Church are increased to include marriage of second cousins and, slightly later, second cousins once removed. The penalty for cousin marriage becomes whipping. 

743 – Roman synod under Pope Zacharias orders Christians to refrain from marrying cousins, nieces, and other kinfolk. Such incest is punishable by excommunication and, if necessary, anathema [cursed by God]. 

755 – The Synod of Verneuil (France), convened under the Frankish King Pepin, commands that marriages be performed publicly. 

756 – Synod of Verbier (France) prohibits the marriage of third cousins and closer and decrees existing marriages between second cousins are to be ended. Those married to third cousins need only do Penance.

757 – Synod of Compiegne (France) rules that existing marriages of second cousins or closer must be nullified. The Frankish King, Pepin, threatens secular punishments for any who disagree. 

796 – Synod of Friuli (Italy) directs attention to prenuptual investigations into potentially incestuous marriages and prohibits clandestine unions. The synod prescribes a waiting time before marriage during which neighbours and elders can examine whether a blood relationship exists that would prohibit marriage. The decree also stipulates that although infidelity by the wife is a legitimate reason for divorce, remarriage is impossible as long as both spouses live. Charlemagne puts his secular authority behind these rulings in 802.

802 – Charlemagne’s capitulary insists that nobody should attempt to marry until the bishops and priests, together with the elders, have investigated the blood relations of the prospective spouses.

874 – Synod of Douci (France) urges subjects to refrain from marrying third cousins. To strengthen the ruling, the synod makes the children of incestuous unions ineligible for succession to an estate. 

909 – Synod of Trosle (France) clarifies and affirms the Synod of Douci, deeming that children born in an incestuous marriage are ineligible to inherit property or titles.

948 – Synod of Ingelheim (Germany) prohibits marriage with all kin as far back as memory goes.

1003 – At the Synod of Deidenhofen (Germany), Emperor Heinrich II (St Henry the Exuberant) substantially widens the incest ban to include sixth cousins. He may have done this to weaken his political rivals.

1023 – Synod of Seligenstadt (Germany) likewise forbids cousin marriage to sixth cousins. Bishop Burchard of Worms’s Decretum also extends the definition of incestuous marriages to include sixth cousins. 

1059 – At the Synod of Rome, Pope Nicholas II forbids marriage to sixth cousins or as far back as relatives can be traced. His successor, Pope Alexander II, likewise decrees that marriages to sixth cousins or closer relatives are forbidden. The Kingdom of Dalmatia gets a temporary dispensation, forbidding marriages only out to fourth cousins.

1063 – Synod of Rome forbids marriages up to sixth cousins. 

1072 – Synod of Rouen (France) forbids non-Christian marriages and decrees a priestly inquiry into all those about to wed.

1075 – Synod of London (England) forbids marriages up to sixth cousins, including affinal kin. 

1101 – In Ireland, the Synod of Cashel introduces the incest prohibitions of the Catholic Church. 

1102 – Synod of London nullifies existing marriages between sixth cousins (and closer) and decrees that third parties who knew of marriages between relatives are implicated in the crime of incest. 

1123 – The First Lateran Council (Italy) condemns unions between blood relatives (without specifying the relatedness) and declares that those who contracted an incestuous marriage will be deprived of hereditary rights. 

1140 – Decretum of Gratian: marriages of up to sixth cousins are forbidden.

*1166 – Synod of Constantinople (Turkey) reinforces the earlier Eastern Church’s prohibitions on cousin marriages (second cousins once removed and closer), and tightens enforcement. 

1176 – The Bishop of Paris, Odo, helps introduce ‘the bans of marriage’ – that is, the public notice of impending marriages in front of the congregation. 

1200 –  Synod of London requires publication of the ‘bans of marriage’, and decrees that marriages be conducted publicly. Kin marriages are forbidden, though the degree of kinship is not specified. 

1215 – Fourth Lateran Council (Italy) reduces marriage prohibitions to third-degree cousins and all closer blood relatives and affines. All prior rulings are also formalised and integrated into a constitution of canons. This brings prenuptual investigations and marriage bans into a formal legislative and legal framework.

1917 – Pope Benedict XV loosens restrictions further, prohibiting only marriage to second cousins and all closer blood and affinal relatives. 

1983 – Pope John Paul II further loosens incest restrictions, allowing second cousins and more distant relatives to marry.

All this is presented in just under four pages of Henrich’s book, and in the book’s Appendix a more expansive 6.5 page version is given. Of course it can never be known how strictly these provisions and restrictions were adhered to, but their very existence, and the many Synods devoted to them, testify to the ambition and power of the Church in Europe for over a thousand years. Its influence impacts upon our attitude to love, marriage and sexual relationships even today. Thankfully, bonobos were spared, obviously due to their complete non-existence in the Christian mind throughout this era. But for European humans these restrictions became more stringent, and more enforceable, as the power of the Church grew. It’s worth noting that the term ‘in-law’ comes from Church canon law. Your brother-in-law is like your brother – treat him nicely, but definitely no hanky-panky. 

So, were the restrictions effectively policed? Actually, the Church had something of a business going in granting dispensations – for a price. It goes along with their granting of ‘indulgences’ of course. In the early days – the days of tribalism – enforcement must have been difficult, but over time the uniformity of religious belief strengthened the Church’s power. Henrich presents this fascinating case:

… though popes and bishops strategically picked their battles, these policies were sometimes imposed on kings, nobles and other aristocrats. In the 11th century, for example, when the Duke of Normandy married a distant cousin from Flanders, the pope promptly excommunicated them both. To get their excommunications lifted, or risk anathema, each constructed a beautiful abbey for the Church. The pope’s power is impressive here, since this duke was no delicate flower; he would later become William the Conqueror.

So, this was the Church’s Marriage and Family Programme (MFP) and it impacted heavily on kin terminology throughout Europe, an impact that slowly radiated outward from the Church’s main power bases (northern Scotland – where I was born – being one of the last cards to fall). 

It’s worth reflecting on how accidental all this was. Had the Emperor Constantine not been converted to Christianity by his Greek mother, Helena (or so the story goes), or had the Emperor Julian, who was quite the intellectual, not been murdered while in the process of ditching the new religion and re-establishing the old gods only a generation or so after Constantine, the whole of European society, the whole of the current WEIRD world, might have turned out differently. Imagine no Catholic Church, no Dark Ages, and an intellectual flowering almost a thousand years before our 15th century ‘renaissance’. The Romans were no slouches in the field of scientific enquiry after all, though there had certainly been a decline since the days of Epicurus and Lucretius. 

So the big unanswerable question here is just how European society would have been structured, on the family and kinship level, and in countless other ways, had Christianity not supervened in such a super-dramatic way. Only the Shadow knows…

And, frankly, I haven’t even begun to unravel the history of monogamy itself – why one person would couple with another to raise children. Our closest living relatives, chimps and bonobos, don’t raise children that way – yet they do raise children, quite successfully. Something to explore in future posts. 

References

Joseph Henrich, The WEIRDest people in the world: How the West became Psychologically Peculiar and Particularly Prosperous, 2020

Edward Gibbon, The Decline and Fall of the Roman Empire, Random House 2003 [first published 1776-1789]