Primogeniture is the right, by law or custom, of the firstborn child to inherit the family estate, in preference to siblings (compare to ultimogeniture). In the absence of children, inheritance passed to collateral relatives, usually males, in order of seniority of their lines of descent. The eligible descendants of deceased elder siblings take precedence over living younger siblings, such that inheritance is settled in the manner of a depth-first search.
The principle has applied in history to inheritance of real property (land) as well as inherited titles and offices, most notably monarchies, continuing until modified or abolished.
Variations on primogeniture modify the right of the firstborn son to the entirety of a family's inheritance (see appanage) or, in the West since World War II with the wider promotion of feminism, eliminate the preference for males over females. Most monarchies in Europe have eliminated male preference in succession: Belgium, Denmark, Luxembourg, Netherlands, Norway and Sweden. The United Kingdom passed legislation to establish gender-blind succession in 2013 but delayed implementation until the 15 other countries which share the same monarch effect similar changes in their succession laws. But the Succession to the Crown Act 2013 will not change the present position in the line of succession to the British throne of Prince George of Cambridge, as the firstborn child and heir of his father William, Duke of Cambridge, who is the firstborn child and heir of his father Charles, Prince of Wales.
- 1 Variations
- 2 Significance
- 3 History
- 4 See also
- 5 References
Under cognatic primogeniture, kinship (of males and females) is determined by tracing through any ancestors to commonality: Those who share cognatic kinship are termed cognates.
Absolute, equal, or lineal primogeniture is a form of cognatic primogeniture where no preference is paid to either gender for order of precedence. This form of primogeniture was not practiced by any modern monarchy before 1980.
However, according to Poumarede (1972), the Basques of the Kingdom of Navarre transmitted title and property to the firstborn, whatever the gender. This inheritance practice was adhered to by the higher nobility and free families alike in the early and high middle ages. The Navarrese monarchy, however, was inherited by dynasties from outside of Navarre which followed different succession laws (usually male preference primogeniture). Eventually only the Basque lower nobility and free families of the Basque country and other regions continued to follow this practice, which persisted as late as the 19th century.
An ancient and alternative way in which women managed to rise to power, especially without displacing the direct male line descendants of the first monarchs, is the historical consortium or coregency between husband and wife or other relatives. The most notable of these are the Egyptian cases of Hatshepsut and Thutmose III, as well as the Ptolemaic Dynasty's kings and queens.
In 1980, Sweden amended its constitution to adopt royal succession by absolute primogeniture, displacing King Carl XVI Gustaf's infant son, Carl Philip, in favor of his elder daughter, Victoria, in the process. Several other monarchies have since followed suit: the Netherlands in 1983, Norway in 1990, Belgium in 1991, Denmark in 2009, Luxembourg in 2011 and the United Kingdom in 2013.
Monaco, the Netherlands and Norway also deviated from primogeniture ad infinitum in the late 20th or early 21st century by restricting succession to the crown to relatives within a specified degree of kinship to the most recent monarch.
Recently, other monarchies have changed or considered changing to absolute primogeniture:
- With the birth of Infanta Leonor of Spain on 31 October 2005 to the Prince and Princess of Asturias, Spain's Prime Minister Zapetero reaffirmed his then government's intention to amend the Spanish constitution by introducing absolute primogeniture. Zapatero's proposal was supported by the leader of the main opposition party, the conservative Partido Popular, making its passage likely. However, Zaptero's administration ended before any amendment was drafted, and the succeeding government has not taken up the issue. Prince Felipe has counseled reformers that there is plenty of time before any constitutional amendment would need to be enacted as the expectation is to leave him next in line to succeed his father despite his elder sisters' continued status as dynasts; equal primogeniture is expected to first apply to his children.
- In July 2006, the Nepalese government proposed adopting absolute primogeniture, but the monarchy was abolished 28 May 2008.
- In 2011 the governments of the United Kingdom and the other 15 Commonwealth realms whose head of state is also the British monarch announced the Perth Agreement, a plan to legislate changes to absolute primogeniture. This will be implemented in all 16 nations simultaneously once the necessary legislation has been passed in each country (in the U.K. this is the Succession to the Crown Act 2013).
- In Japan, debates have occurred over whether to adopt absolute primogeniture, as Princess Aiko is the only child of Crown Prince Naruhito. However, the birth of Prince Hisahito, a son of Prince Akishino (the younger brother of Crown Prince Naruhito, and next in line to the Chrysanthemum Throne following Naruhito) has sidelined the debate.
The order of succession for all noble dignities is determined in accordance with the title of concession and, if there is none, with that traditionally applied in these cases. When the order of succession to the title is not specified in the nobility title creation charter, the following rules apply:
- Absolute preference is given to the direct descending line over the collateral and ascending line, and, within the same line, the closest degree takes precedence over the more remote and, within the same degree, the elder over the younger, combined with the principles of firstborn and representation.
- Men and women have an equal right of succession to grandeeship and to titles of nobility in Spain, and no person may be given preference in the normal order of succession for reasons of gender.— 
Male-preference cognatic primogeniture
Male-preference cognatic primogeniture allows a female member of a dynasty to succeed if she has no living brothers and no deceased brothers who left surviving legitimate descendants. A dynast's sons and their lines all come before that dynast's daughters and their lines. Older sons and their lines come before younger sons and their lines. Older daughters and their lines come before younger daughters and their lines.
This was the most common primogeniture practiced in Western European feudalism, such as the Castilian Siete Partidas. Male-preference primogeniture is currently practiced in succession to the thrones of Monaco, Spain, Thailand, and the sixteen Commonwealth realms. It also was practiced in Portugal and the Empire of Brazil.
With respect to hereditary titles, it is usually the rule for Scotland and baronies by writ in the United Kingdom; although baronies by writ go into abeyance when the last male titleholder dies leaving more than one surviving sister or more than one descendant in the legitimate female line of the original titleholder.
Under agnatic primogeniture, or patrilineal primogeniture, kinship (of males and females) is determined by tracing through only male ancestors to commonality: Those who share agnatic kinship are termed agnates.
There were different types of succession based on agnatic primogeniture, all sharing the principle that inheritance is according to seniority of birth amongst the agnatic kin, firstly, among the sons of a monarch or head of family, with sons and their male-line issue inheriting before brothers and their issue.
When an agnatic primogeniture system altogether excludes females from inheritance of the family's main possessions, it is known in Europe as application of the Salic law (see Terra salica). By the beginning of the 19th century, only the royal houses of Bourbon and Savoy, among Europe's historic national dynasties, continued to completely bar women from succession. Later, the new monarchies or dynasties of France (under the Bonapartes), Belgium, Denmark (beginning in 1853), Sweden (beginning in 1810), and the Balkan realms of Albania, Bulgaria, Montenegro, Romania, and Serbia introduced Salic law. During this era, Spain and Portugal fought civil wars which pitted the Salic and female-line heirs of their dynasties against one another for possession of the crown.
Most British and French titles of nobility descend to the senior male by primogeniture, to the exclusion of females, and agnatic cadets may bear courtesy titles. The Channel Isles have different rules.
A variation on Salic primogeniture allows the sons of women to inherit, but not women themselves, an example being the Francoist succession to the throne of Spain from 1947 to 1978. This is the law in Liechtenstein and in the former Archduchy of Austria.
Under uterine primogeniture, kinship (of males and females) is determined by tracing through only female ancestors to commonality: A male may also inherit a right of succession through a female ancestor or spouse, to the exclusion of any female relative who might be older or of nearer proximity of blood (see above for Spain's mid-twentieth century dynastic succession law). In such cases, inheritance depends on uterine kinship, so a king would typically be succeeded by his sister's son. This particular system of inheritance applied to the thrones of the Picts of Northern Britain and the Etruscans of Italy. Some kingdoms and tribes in Africa follow the same practice. This usage may stem in part from the certainty of the relationship to the previous king and kings: sons and daughters of a sister are, even if they don't have the same father, his relations (mater semper certa est).
Matrilineal primogeniture, or female-preference uterine primogeniture, is a form of succession practised in some societies, in which the eldest female child inherits the throne, to the total exclusion of males. The order of succession to the position of the Rain Queen is an example in an African culture of matrilineal primogeniture: not only is dynastic descent reckoned through the female line, but only females are eligible to inherit.
Another variation on agnatic primogeniture is the so-called semi-Salic law, or "agnatic-cognatic primogeniture", which allows women to succeed only at the extinction of all the male descendants in the male line. Such were the cases of Bourbon Spain until 1833 and the dominions of Austria-Hungary, as well as most realms within the former Holy Roman Empire, i.e. most German monarchies. This was also the law of Luxembourg until equal primogeniture was introduced on 20 June 2011.
There are various versions of semi-Salic law also, although in all forms women do not succeed by application of the same kind of primogeniture as was in effect among males in the family. Rather, the female who is nearest in kinship to the last male monarch of the family inherits, even if another female agnate of the dynasty is senior by primogeniture. Among sisters (and the lines of descendants issuing from them), the elder are preferred to the younger. In reckoning consanguinity or proximity of blood the dynasty's house law defines who among female relatives is "nearest" to the last male.
In Democracy in America, Alexis de Tocqueville argues that the abolition of the laws of primogeniture and entail in the law of inheritance of private property (as opposed to inheritance of a monarchy) result in the more rapid division of land and thus force landed people to seek wealth outside the family estate in order to maintain their previous standard of living, accelerating the death of the landed aristocracy and also quickening the shift to democracy.
In Christian Europe, the church had a monopoly on the power to sanction marriage. It discouraged polygamy and divorce. Consequently, in Europe, it was extremely difficult to ensure succession solely by direct male line or even by direct offspring. In Islamic, and Oriental cultures, religion either sanctioned polygyny or use of consorts, or had no authority over marriage; monarchs could consequently ensure sufficient numbers of male offspring to assure the succession. In such cultures, female heads of state were rare, also.  In Japan, the system still mandates that the heir to the throne must be a male; there is only one male grandchild of the current emperor.
The earliest account of primogeniture to be widely known in modern times involved Isaac's son Jacob being born second and Isaac's son Esau being born first  and entitled to the "birthright" (bekhorah בְּכוֹרָה), but eventually selling it to Isaac's second son, Jacob, for a small amount of food. Although the veracity of this account has not been established through other sources, its widespread acceptance shows that primogeniture was sufficiently common in the Middle East for the account to seem plausible to the people living there prior to the Roman Empire.
During the Roman Empire, Roman law governed much of Europe, and the laws pertaining to inheritance made no distinction between the oldest or youngest, male or female, if the deceased left no will. Although admission to the two highest "orders" (ordines, the senators and equestrians) potentially brought lifetime privileges that could be handed down to the next generation, the principle of inherited rank in general was weak. Rather, Roman aristocracy was based on competition, and a Roman family could not maintain its position in the ordines merely through hereditary succession or having title to lands. Although the eldest son typically carried his father's name in some form, he was expected to construct his own career based on competence as an administrator or general and on remaining in favor with the emperor and his council at court. Other than meeting requirements for personal wealth, the qualifications for belonging to the senatorial or equestrian orders varied from generation to generation, and in the later Empire, the dignitas ("esteem") that attended on senatorial or equestrian rank was refined further with additional titles, such as vir illustris, that were not inherited.
Most Roman emperors indicated their choice of successor, usually a close family member or adopted heir, and the presumption that the eldest or even a natural son would inherit was not enshrined. The death of an emperor led to a critical period of uncertainty and crisis. In theory, the Senate was entitled to choose the new emperor, but did so mindful of acclamation by the army or the Praetorian Guard. Thus, neither an emperor nor his heir had an inherent "right" to rule, and did so through military power and the Senate's symbolic consent.
Reemergence in medieval and modern times
The law of primogeniture in Europe has its origins in Medieval Europe; which due to the feudal system necessitated that the estates of land-owning feudal lords be kept as large and united as possible to maintain social stability as well as the wealth, power and social standing of their families.
Adam Smith, in his book An Inquiry into the Nature and Causes of the Wealth of Nations, explains the origin of primogeniture in Europe in the following way:
[W]hen land was considered as the means, not of subsistence merely, but of power and protection, it was thought better that it should descend undivided to one. In those disorderly times, every great landlord was a sort of petty prince. His tenants were his subjects. He was their judge, and in some respects their legislator in peace and their leader in war. He made war according to his own discretion, frequently against his neighbours, and sometimes against his sovereign. The security of a landed estate, therefore, the protection which its owner could afford to those who dwelt on it, depended upon its greatness. To divide it was to ruin it, and to expose every part of it to be oppressed and swallowed up by the incursions of its neighbours. The law of primogeniture, therefore, came to take place, not immediately indeed, but in process of time, in the succession of landed estates, for the same reason that it has generally taken place in that of monarchies, though not always at their first institution.
A case of agnatic primogeniture is exemplified in the French royal milieu, where the Salic law (attributed to the Salian Franks) forbade any inheritance of a crown through the female line. This rule was adopted to solve the dispute over the legitimate successor of Charles IV of France (Edward III of England or Philip VI of France, though the former would have a stronger claim should proximity of blood be considered, which had never been the case in France since 987, instead as well of both agnatic-cognatic primogeniture or male-preference cognatic primogeniture and the resulting heirs). Conflict between the Salic law and the male-preferred system was also the genesis of Carlism in Spain.
The crowns of Hanover and Great Britain, which had been in personal union since 1714, were separated in 1837 upon the death of King William IV: his niece Victoria inherited the British crown under male-preference primogeniture but, because of semi-Salic law, was ineligible to that of Hanover, which passed to William's eldest surviving brother, Ernest I.
In 1890, the divergence of the thrones of Luxembourg and the Netherlands, both ruled by semi-Salic law, was caused by the fact that the Luxembourg line of succession went back more generations than the Dutch one. The Luxembourg succession was ruled by the provisions of the Nassau House Treaty of 1783. Where the succession is concerned, Luxembourg is the successor state to the Principality of (Orange-)Nassau-Dietz. The Dutch succession only went back to King William I (1815–1840). Therefore Luxembourg still had agnatic heirs from another branch of the House of Nassau left to succeed, while in the Netherlands the male line starting with William I was depleted.
Since the Middle Ages, the semi-Salic principle was prevalent for the inheritance of feudal land in the Holy Roman Empire: inheritance was allowed through females when the male line expired. Females themselves did not inherit, but their male issue could. For example, a grandfather without sons was succeeded by his grandson, the son of his daughter, although the daughter still lived. Likewise, an uncle without sons of his own was succeeded by his nephew, a son of his sister, even if the sister still lived.
Common in feudal Europe outside of Germany was land inheritance based on a form of primogeniture: A lord was succeeded by his eldest son but, failing sons, either by daughters or sons of daughters. In most medieval Western European feudal fiefs, females (such as daughters and sisters) were allowed to succeed, brothers failing. But usually the husband of the heiress became the real lord, assuming his wife's title with the suffix jure uxoris.
In more complex medieval cases, the sometimes conflicting principles of proximity of blood and primogeniture competed, and outcomes were at times unpredictable. Proximity meant that an heir closer in degree of kinship to the lord in question was given precedence although that heir was not necessarily the heir by primogeniture.
- The Burgundian succession in 1361 was resolved in favor of King John II, son of a younger daughter, on basis of blood proximity, being a nearer cousin of the dead duke than Charles II of Navarre, grandson of the elder daughter and son of Jeanne. John was only one generation of consanguinity removed from the late duke instead of two for Charles.
- In dispute over the Scottish succession, 1290–91, the Bruce family pleaded tanistry and proximity of blood, whereas Balliol argued his claim based on primogeniture. The arbiter, Edward I of England, decided in favor of primogeniture. But later, the Independence Wars reverted the situation in favor of the Bruce, due to political exigency.
- The Earldom of Gloucester (in the beginning of 14th century) went to full sisters of the dead earl, not to his half-sisters, though they were elder, having been born of the father's first marriage, while the earl himself was from second marriage. Full siblings were considered higher in proximity than half-siblings.
However, primogeniture increasingly won legal cases over proximity in later centuries.
Later, when lands were strictly divided among noble families and tended to remain fixed, agnatic primogeniture (practically the same as Salic Law) became usual: succession going to the eldest son of the monarch; if the monarch had no sons, the throne would pass to the nearest male relative in the male line.
Some countries, however, accepted female rulers early on, so that if the monarch had no sons, the throne would pass to the eldest daughter. For example, in 1632 Queen Christina of Sweden succeeded to the throne after the death of her father, King Gustav II Adolf.
In England, primogeniture was mandatory for inheritance of land. Until the Statute of Wills was passed in 1540, a will could control only the inheritance of personal property. Real estate (land) passed to the eldest male descendant by operation of law. The statute added a provision that a landowner could "devise" land by the use of a new device called a "testament". The rule of primogeniture in England was not changed until the Administration of Estates Act in 1925.
In law, primogeniture is the rule of inheritance whereby land descends to the oldest son. Under the feudal system of medieval Europe, primogeniture generally governed the inheritance of land held in military tenure (see knight). The effect of this rule was to keep the father's land for the support of the son who rendered the required military service. When feudalism declined and the payment of a tax was substituted for military service, the need for primogeniture disappeared. In England, consequently, there was enacted the Statute of Wills (1540), which permitted the oldest son to be entirely cut off from inheriting, and in the 17th century military tenure was abolished; primogeniture is, nevertheless, still customary in England. In the United States, primogeniture never became widely established.
- Murphy, Michael Dean. "A Kinship Glossary: Symbols, Terms, and Concepts". Retrieved 5 October 2006.
- SOU 1977:5 Kvinnlig tronföljd, p. 16.
- "Succession strategies in the Pyrenees in the 19th century: The Basque case".
- "New Kerala".
- Watt, Nicholas (28 October 2011). "Royal equality act will end succession of firstborn male – rather than older sister". The Guardian. Retrieved 28 October 2011.
- Nobility and Grandee Titles, Spanish Ministry of Justice extracted 05/31/09
- According to the Spanish Ministry of Justice, the default of the succession is by absolute cognatic primogeniture, but the title holder may designate his or her successor or distribute titles among children, provided that the eldest inherits the highest-ranking title unless choosing to waive that right.
- Nordisk familjebok, Tronföljd, 1920; SOU 1977:5 Kvinnlig tronföljd.
- de Tocqueville, Alexis (1835). "3-The Social Condition of the Anglo-Americans". Democracy in America.
- Women in World History Curriculum. "Female Heroes of Asia: China". Retrieved 21 February 2014.
- "List_of_queens_regnant". Wikipedia.
- Genesis 25:26
- Genesis 25:25
- Genesis 25:31-34
- HN.psu.edu Smith, Adam, (1776), Penn State Electronic Classics edition, republished 2006, p. 312.
- Millar, Fergus (1983). "Empire and City, Augustus to Julian: Obligations, Excuses and Status". Journal of Roman Studies, 73. pp. 87–88.
- Hopkins, Keith (2000). "The Political Economy of the Roman Empire," in The Dynamics of Ancient Empires: State Power from Assyria to Byzantium (Oxford University Press), p. 188.
- Hopkins, The Political Economy of the Roman Empire, p. 188.
- Millar. "Empire and City". p. 90, calls them "status-appellations".
- Winterling, Aloys. Politics and Society in Imperial Rome. (John Wiley & Sons, 2009, originally published 1988 in German). p. 16.
- HN.psu.edu Smith, Adam (1776), Penn State Electronic Classics edition, republished 2005, p. 312-313.