Statistical evidence for an ecological explaination of warfare

Population density will be related to the likelihood of warfare for land in New Guinea (646).

Test
Test Name	Support	Significance	Coefficient	Tail
Fisher’s exact test	Supported	p<.005	phi=.78	One-tailed

Variables
Variable Name	Variable Type	OCM Term(s)
Likelihood Of Warfare For Land	Dependent	Instigation Of War
Population Density	Independent	Population

Main Author	Published Year	Hypothesis	Supported	Variables Tested
Moritz, Mark	2020	Competition for resources is positively correlated with type of land tenure system.	Not Supported	4	Cite Related Hypotheses More By Author
Kelly, Robert L.	2000	Population density will be positively associated with warfare frequency (71).	Not Supported	2	Cite Related Hypotheses More By Author
Kelly, Raymond C.	2000	Population density will be positively associated with frequency of warfare (71).	Not Supported	2	Cite Related Hypotheses More By Author
Kavanaugh, Patrick	2021	Population density will be positively associated with property ownership	Supported	2	Cite Related Hypotheses More By Author
Winkelman, Michael James	1998	Population density, population pressure, internal and external war for land and resources, and a low hierarchical focus of religion will be positively associated with human sacrifice (285, 294).	Supported	5	Cite Related Hypotheses More By Author