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Back to Africa: 400 to 301 B.C.

Northeast africa

One thousand miles south of the Mediterranean (in what is now the Republic of Sudan) the Kingdom of Meroe flourished through this period. At first the culture was Egyptian but later it developed a unique African character with its main industry being iron working. It also had gold. This society was a successor to Kush, simply with a new capital at Meroe. Still farther south was the Semitic Habashat Kingdom, established by migrating Yemenites, with a capital at Axum. The local Cushites soon began to accept the language and customs of these Semites and the country began to prosper, exporting ivory, tortoise shell, rhinoceros horn and finally gold, through the Red Sea. (Ref. 83 )

The real story of this corner of Africa, however, remained in Egypt. In spite of the Greek conquest of the previous century most of Egypt remained Egyptian and there was a return to Egyptian political ideas. Ptolemy II (Philadelphus), reigning from 309 to 246 B.C. took the title of Pharaoh, the God-King, although personally he was a modest man, intelligent and creative. Under him there was continued expansion along the Phoenician and Asia Minor coasts. Ptolemy III (283 - 221) followed. An interesting aspect of Ptolemaic Egypt is its extensive experiment in state socialism. Although royal ownership of the land had long been a custom, the king now supervised all economic activity. The government decided which fields were to be planted and with what, where crops were to be sold and for how much. It regulated transportation, processing, manufacturing, trade and banking, sold abandoned babies and taxed everything. From about 275 to 215 B.C. this system made the Ptolemies the richest Hellenistic rulers. This wealth was lavished on the city of Alexandria which became the greatest trade center in the world and acted as a fusion center for people of many religions, including a great number of Jews. The Alexandria Museum was actually a university, engaged in research and records and a certain amount of teaching. During its active phase it helped to produce Euclid, Eratosthenes, Apollinus, Hipparchus, Hero and Archimedes.

At this time the center of Greek medicine also shifted to Alexandria, with Herophilus, anatomist, and Erasistratus, regarded by some as the founder of physiology. He distinguished between motor and sensory nerves, gave names to the heart valves and studied arteries, veins and lymphatic ducts. Actually a number of different sects of medicine such as Dogmatism, Empiricism, Methodism, Pneumatism and Eclecticism developed or radiated out from Alexandria. One of the Dogmatists, Herophilos, was responsible for a number of human anatomical descriptions including various parts of the brain, the intestinal tract, lymphatics, liver, genital organs, eye and the vascular system. The Museum functioned at a high level for only a century, however, and after Ptolemy II it was swallowed up by the Egyptian priestcraft. Attic-Greek was the language of education and administration. (Ref. 47 , 125 , 15 , 224 )

Questions & Answers

how to know photocatalytic properties of tio2 nanoparticles...what to do now
Akash Reply
it is a goid question and i want to know the answer as well
Do somebody tell me a best nano engineering book for beginners?
s. Reply
what is fullerene does it is used to make bukky balls
Devang Reply
are you nano engineer ?
what is the Synthesis, properties,and applications of carbon nano chemistry
Abhijith Reply
Mostly, they use nano carbon for electronics and for materials to be strengthened.
is Bucky paper clear?
so some one know about replacing silicon atom with phosphorous in semiconductors device?
s. Reply
Yeah, it is a pain to say the least. You basically have to heat the substarte up to around 1000 degrees celcius then pass phosphene gas over top of it, which is explosive and toxic by the way, under very low pressure.
Do you know which machine is used to that process?
how to fabricate graphene ink ?
for screen printed electrodes ?
What is lattice structure?
s. Reply
of graphene you mean?
or in general
in general
Graphene has a hexagonal structure
On having this app for quite a bit time, Haven't realised there's a chat room in it.
what is biological synthesis of nanoparticles
Sanket Reply
what's the easiest and fastest way to the synthesize AgNP?
Damian Reply
types of nano material
abeetha Reply
I start with an easy one. carbon nanotubes woven into a long filament like a string
many many of nanotubes
what is the k.e before it land
what is the function of carbon nanotubes?
I'm interested in nanotube
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Ramkumar Reply
what is nano technology
Sravani Reply
what is system testing?
preparation of nanomaterial
Victor Reply
Yes, Nanotechnology has a very fast field of applications and their is always something new to do with it...
Himanshu Reply
good afternoon madam
what is system testing
what is the application of nanotechnology?
In this morden time nanotechnology used in many field . 1-Electronics-manufacturad IC ,RAM,MRAM,solar panel etc 2-Helth and Medical-Nanomedicine,Drug Dilivery for cancer treatment etc 3- Atomobile -MEMS, Coating on car etc. and may other field for details you can check at Google
anybody can imagine what will be happen after 100 years from now in nano tech world
after 100 year this will be not nanotechnology maybe this technology name will be change . maybe aftet 100 year . we work on electron lable practically about its properties and behaviour by the different instruments
name doesn't matter , whatever it will be change... I'm taking about effect on circumstances of the microscopic world
how hard could it be to apply nanotechnology against viral infections such HIV or Ebola?
silver nanoparticles could handle the job?
not now but maybe in future only AgNP maybe any other nanomaterials
I'm interested in Nanotube
this technology will not going on for the long time , so I'm thinking about femtotechnology 10^-15
can nanotechnology change the direction of the face of the world
Prasenjit Reply
how did you get the value of 2000N.What calculations are needed to arrive at it
Smarajit Reply
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Source:  OpenStax, A comprehensive outline of world history (organized by region). OpenStax CNX. Nov 23, 2009 Download for free at http://cnx.org/content/col10597/1.2
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