Ibn Khaldun

Ibn Khaldun (alias Abū Zayd ‘Abd ar-Raḥmān ibn Muḥammad ibn Khaldūn al-Ḥaḍramī) was born 27 May 1332 in Tunis. He was a Muslim Arab from a well-to-do family whose later works, both autobiographical and historical, provide modern scholars with some of the best available information on his time and the Ottoman Empire. When he was 17 years old, his parents both died from the Black Death. They had enabled him, however, to study with some of the finest teachers available, which helped determine the course of his life.

Part of that life was spent in government service, as described in this post from a few months ago. He wrote about the world around him, giving us insight into the history of his part of the world here.

His most enduring contribution to scholarship may have been the Muqaddimah, (Arabic "Prologue"). In it we find the first literature on sociology. He introduces the concept of social asabiyyah, (Arabic "tribalism" or "social cohesion" or "nationalism"); asabiyyah is either rising or falling, and societies go through these cycles. He points out that dynasties usually have the seeds of their own downfall, becoming complacent in their power and authority, allowing a peripheral asabiyyah unit to eventually take over. (A good example of this is how the "Mayors of the Palace" grew more powerful than their bosses, the Merovingian kings, and became the Carolingian dynasty.)

He also wrote about the relationship population growth and economic growth:

When civilization [population] increases, the available labor again increases. In turn, luxury again increases in correspondence with the increasing profit, and the customs and needs of luxury increase. Crafts are created to obtain luxury products. The value realized from them increases, and, as a result, profits are again multiplied in the town. Production there is thriving even more than before. And so it goes with the second and third increase. All the additional labor serves luxury and wealth, in contrast to the original labor that served the necessity of life. [source]

He also explained the basis of supply and demand:

The inhabitants of a city have more food than they need. Consequently, the price of food is low, as a rule, except when misfortunes occur due to celestial conditions that may affect [the supply of] food. [source]

Supply-side economics, the idea that lower taxes will lead to economic growth, also shows up in his theories:

It should be known that at the beginning of the dynasty, taxation yields a large revenue from small assessments. At the end of the dynasty, taxation yields a small revenue from large assessments. [Laffer Associates (November 11, 2003)]

This is known in modern times as the Laffer Curve, but even Arthur Laffer gives credit to Ibn Khaldun!

He spent much of his later life teaching. In 1384, the Egyptian sultan named him the Grand qadi (judge of Sharaia law) in Western Africa. Sadly, in that same year his wife and children died when their ship sank off Alexandria. His final years were spent writing his autobiography and teaching in Cairo. He died 17 March 1406.

All this talk of sociology brings up the question: what do sociologists think of the Middle Ages? How do they analyze cultural trends and practices centuries removed from being able to observe medieval society? There are different approaches, which I'll talk about next.

The Richest Man of All Time

Current estimates of the richest people living today show Elon Musk topping the chart at 200+ billion dollars, but I'm going to tell you about someone who had twice that (adjusted for modern values).

Mansa Musa (reigned 1312 - 1337) was the ninth mansa (Mandinka word, generally translated "king") of the Mali Empire. The Mali Empire of West Africa thrived from 1235 - 1670 and included what is now Gambia, Guinea, Mauritania, Senegal, and of course Mali.

Much of the history and lore that has come down to us about the Mali Empire is from the 14th century North African traveler Ibn Khaldun and 14th century Moroccan traveler Ibn Battuta.

Mali had two resources for which the world hungered: salt and gold (and to a certain extent, copper). Salt was sometimes more important than gold, especially south of Mali where it was scarce and needed for people's diet. Ibn Battuta reported that the salt mines were in the desert where there was nothing else, no trees. Those who worked the mines cut the salt into slabs from which they built their huts, roofed over with camel skins. Salt was sold in slabs—two slabs per camel—and cost more the further it had to be transported.

All gold mined or found was legally the property of the mansa; it was illegal to trade gold within the borders, and all gold had to be turned over to the Mali imperial treasury. Gold as converted to gold dust, carefully measured and bagged and counted as a mithqal, equivalent to 4.5 grams. Mithqal was used interchangeably with dinar, although dinar usually referred to a coin. There are no Mali coins.

Mansa Musa became well-known across Northern Africa and the Middle East for his generosity when he, a faithful Muslim, made a pilgrimage to Mecca. This hajj covered 2700 miles between 1324 and 1325, and supposedly consisted of 60,000 men in fine clothing, accompanied by 12,000 slaves, each of whom carried four pounds of gold bars, and 80 camels, each of which carried up to 300 pounds of gold dust.

Along the way, Musa paid for all the necessary provisions for his caravan. He also (it is reported) built a mosque each Friday, and gave gold and gifts to the poor and cities as he passed. He also bought souvenirs. Once reaching Medina and Mecca, he continued to give gifts of gold everywhere, knowing that he had plenty at home.  Unfortunately, he gave so much gold along the way that it became devalued, inflation rose, and it took awhile for prices of gold to increase again.

His generosity also meant that, on the way back home, he ran out of money and had to sell many of his possessions and souvenirs to get back to Mali.

The date of his death is recorded by Ibn Khaldun, but there is some confusion  when comparing it to other sources. It seems likely that his reign ended in 1337, and that is the likeliest year of his death. Khaldun was writing years later and doing his best from the available sources, most of which was oral stories from those who knew Musa.

Still, Ibn Khaldun was known for his contractions to philosophy and history, etc., and worth a closer look...next time

The Laffer Curve

That is an odd headline (and topic) for a blog on the Middle Ages, but let's push on and see where we wind up. The Laffer Curve (named for Arthur Laffer, illustrates a "a supposed relationship between economic activity and the rate of taxation which suggests that there is an optimum tax rate which maximizes tax revenue." [New Oxford American Dictionary] Arthur Laffer acknowledged that Ibn Khaldun essentially defined what we now call the Laffer Curve in his best-known book, Al-Muqaddimah ("Introduction").

We know quite a bit about Ibn Khaldun (27 May 1332 - 17 March 1406) because he wrote an autobiography. Born to a wealthy Arabic family, he was able to trace his ancestry back to the time of Mohammed. He had a classical Islamic education, memorized the Koran, and studied law and Arab linguistics. He also learned mathematics, logic, and philosophy. While in his teenage years, both parents died in the first big wave of the Black Death.

He started his political career at the age of 20 in Tunisia, producing fine calligraphy on official documents, but shortly after moved to Fez as a writer of royal proclamations. There he fell out with the sultan while scheming to advance himself and went to jail for 22 months. After getting out, he was not getting the attention he felt he deserved in terms of jobs, and decided to move to Granada. The Sultan of Granada gave him a diplomatic mission to King Pedro the Cruel of Castile, which Ibn Khaldun carried out successfully. Eventually getting involved in too much political intrigue, he left for Ifriqiya, where the current sultan had been Khaldun's cellmate! The sultan made Khaldun his prime minister. In 1366, that sultan died, and Khaldun allied himself with a different sultan, who was defeated a few years later, upon which Khaldun decided a monastic life was best. He continued to get involved in politics, however, always finding ways to anger someone.

Regarding his works, Al-Muqaddimah was the first part of a seven-volume work that included a world history up to his time. The socio-economic-geographical approach to describing empires is considered by 19th and 20th century scholars as the first ever writing in the social sciences. Khaldun explains that there is a group solidarity that enables small groups to grow in power, and yet become their own worst enemy and eventually fall from power and be overcome by another tightly knit group. He had similarly ahead-of-his-time ideas about economics.

I will leave the discussion of Ibn Khaldun (for now at least) with one more thing: his apt description of government as "an institution which prevents injustice other than such as it commits itself."

A large part of his historical work involves the Berbers, and I will talk about them in the next post.