Showing posts with label Migration. Show all posts
Showing posts with label Migration. Show all posts

Wednesday, 3 December 2014

The Akkadians: Not quite the Rivers of Babylon



A Map showing the Location and extent
of the Akkadian Empire
Source: Wikipedia

The region of Mesopotamia is situated between the Tyris and Eupherates rivers in the Levant, which is often also referred to as the Fertile Crescent, one of the nuclei from which agriculture developed and spread across the world (deMenocal 2001). Because of these fertile lands, several civilizations settled cities and formed empires on the alluvial plains between the two rivers, such as: Babylon, Seleucids and Assyria. These series of posts are going to focus on the Akkadian empire.




The Akkadian empire gained their influence of the subject through the exploitation and management of agriculture processes on the Fertile Crescent (Weiss et al1993). In particular, the elite created store houses and regimes in which produce became stored to withstand periods of droughts (Weiss et al1993). Storage became so great that the empire actually began long distance trade with other settlements and civilizations, which in turn, helped the economy, grow and prosper (Linden 2006).  Weiss etal (1993) noted that the Northern and Southern parts of the empire undertook different roots to manage agriculture; whereby the North produced Imperial fortresses whilst the south focused on irrigation to extend the amount of cultivated land.

Excevation of Tell Leilan dating back
to the Akkadian empire
Source: HistoryFiles
Tell Leilan, located in the Northern region of the Akkadian empire, is the provincial capital and one centre of agriculturial and economic power towards the Southern Alluvial plains towards the Tigris and Eupherates Deltas (Linden 2006).
of the primary providers of cerals for the region (Cullen et al 2004). For that reason Tell Lilian has been excavated and studied intensely by looking at different assemblages of pottery and architecture (Weiss et al 1993; Linden 2006). Though what is most interesting about this site is that most of the structure have been left half built, monuments not fully erected almost, as if all the citizens just got up and left (Cullen et al 2004).

So it begs the question, what caused this mass abandonment?

Tuesday, 18 November 2014

The Birth of Agriculture: Migrating for the world





Graphs showing the likelihood
of agriculture originating in
that region. Demonstrating
demic migration of agriculture
practices.
Source: Pinhasi et al 2005
As I eluded to in my previous blog, agriculture didn’t originate in one single place, but actually in several different areas, mainly though the Eastern Sahara, Southwest China and most importantly the Near East. So, how did agriculture spread?


Within the literature there has been two theories proposed called, cultural and demic diffusion, where the former relates to the movement of agricultural tools and ideas, whereas the latter relates to the movement of farmers from these sites of origins (Cavalli –Sforza 1996). Methods such as gene frequency and language have been used to try and model the dispersion of agriculture, with a focus on SE Asia and the Near East (Cavalli-Sforza 1996; Renfrew 1996). Pinhasi et al(2005) shows that 20% of the European gene pool is shared with Near East, with that value reducing as one reaches North West Europe. This seems to indicate an initial migration of farmers from the Near East across environmental corridors at a speed of roughly 0.6-1.3km/y, all of which is consistent with a demic diffusion of agriculture (Pinhasi et al 2005)





This is reflected in Southwest Asia by Renfew (1996) which also showed a strong genetic cline originating out from the ‘nucleus of origin’. Not only that, but he also noted the movement of languages across Europe and Asia, of which seems to show similarities to that of the ‘nucleus’. Both of these conclusions line up with the diagram constructed Bar-Yousef (1998) which depicts the movement and time frame of agriculture during the Holocene. All of this evidence seems to solely point towards demic diffusion.


A Map showing the 'nucleus origin' and expansion routes of agriculture
Source: Bar-Yousef (1998)

Though this might not occur unless the conditions are favourable to allow migration, which usually involves the saturation of the existing population and the suitability of the dispersion destination, which is often controlled by the society itself and the local environment  (Renfrew 1996). A nice example regards cattle in the Eastern Sahara, although this is the nucleus of cattle domestication (9.5 kyra), they weren’t shown in the Nile Valley record until the introduction of Near Eastern Cattle around 5.9 kyra (Garcea 2004). Why might this have been the case? The technology was already there, though the climate didn’t facilitate a safe dispersion until a more humid climate occurred, providing a corridor to cross the desert (Garcea 2004)

Rock Wall Art from the Sahara showing the domestic use of cattle
Source: Garcea 2004

So not only has climate been designated as a leading factor in the birth of agriculture in the ‘nucleases of origin’, but it has also been shown to be an important factor in allowing the farmers migrate to new areas and societies which allowed the spread of agriculture. On top of all that, climate has been shown to be a powerful agent in shaping and pushing settlements into complex societies through mediums like agriculture and harsh environmental conditions. So now it is time to start showing you some examples of how climate affected the birth, fall and cultures of some civilizations.