On the development of unilineal descent

". . . we . . . expect that societies with internal warfare would be more apt to have lineages than those with purely external war . . ." (80)

Test
Test Name	Support	Significance	Coefficient	Tail
phi, Fisher's exact test	Supported	p<.05	.40	One-tailed

Variables
Variable Name	Variable Type	OCM Term(s)
Lineages	Dependent	Lineages
Warfare (presence Or Absence Of External Or Internal)	Independent	Warfare

Main Author	Published Year	Hypothesis	Supported	Variables Tested
Ember, Carol R.	1974	". . . given internal war, lineages are more apt to be found when the density is at least five persons per square mile" (83)	Supported	3	Cite Related Hypotheses More By Author
Ember, Carol R.	1974	". . . among unilineal societies with internal warfare, those with higher densities would be more likely to have lineages than those with low densities" (82)	Supported	4	Cite Related Hypotheses More By Author
Grueter, Cyril C.	2014	Internal warfare will decrease with increasing external warfare, intercommunity trade, and patrilocal residence (6).	Not Supported	4	Cite Related Hypotheses More By Author
Otterbein, Keith F.	1968	"If culturally similar political communities unite to engage in external war, then internal war will be infrequent" (285)	Not Supported	2	Cite Related Hypotheses More By Author
Adams, David B.	1983	Population size over 20,000 is positively associated with the existence of frequent internal warfare combined with low frequency of warfare (203)	Supported	3	Cite Related Hypotheses More By Author