Section: Social Complexity

Subsection: Transport infrastructure

Bridge

bridges refers to bridges built and/or maintained by the polity (that is, code 'present' even if the polity did not build a bridge, but devotes resources to maintaining it). (See here)

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Variable	Definition
Polity	The Seshat Polity ID
Year(s)	The years for which we have the data. [negative = BCE]
Tag	[Evidenced, Disputed, Suspected, Inferred, Unknown]
Verified	A Seshat Expert has approved this piece of data.

Variable	Definition
bridge	The absence or presence of bridge for a polity.

Actual Data:

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#	Polity	Year(s)	Bridge	Description	Edit
171	(Jenne-jeno I)	Full Year Range of Jenne-jeno I is assumed. [-250, 49]	unknown	None
172	(Jenne-jeno II)	Full Year Range of Jenne-jeno II is assumed. [50, 399]	unknown	None
173	(Jenne-jeno III)	Full Year Range of Jenne-jeno III is assumed. [400, 899]	unknown	None
174	(Jenne-jeno IV)	Full Year Range of Jenne-jeno IV is assumed. [900, 1300]	unknown	None
175	(Mali Empire)	Full Year Range of Mali Empire is assumed. [1230, 1410]	unknown	None
176	(Songhai Empire - Askiya Dynasty)	Full Year Range of Songhai Empire - Askiya Dynasty is assumed. [1493, 1591]	unknown	None
177	(Yisrael)	Full Year Range of Yisrael is assumed. [-1030, -722]	absent	Probably absent according to Dorsey.§REF§Dorsey (1991).§REF§
178	(Kampili Kingdom)	Full Year Range of Kampili Kingdom is assumed. [1280, 1327]	unknown	Likely had the ability to construct bridges.
179	(Magadha - Maurya Empire)	Full Year Range of Magadha - Maurya Empire is assumed. [-324, -187]	present	The Royal road must have crossed some streams or rivers and required bridge-building.
180	(Norman England)	Full Year Range of Norman England is assumed. [1066, 1153]	present

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