The evolution of war:  a cross-cultural study

"The higher the level of political centralization, the higher the degree of military sophistication" (75)

Test
Test Name	Support	Significance	Coefficient	Tail
Point-biserial correlation	Supported	p<.001	.64	Two-tailed

Variables
Variable Name	Variable Type	OCM Term(s)
Centralization Of Political System	`UNKNOWN`	Territorial Hierarchy
Military Sophistication	`UNKNOWN`	Military Organization

Main Author	Published Year	Hypothesis	Supported	Variables Tested
Otterbein, Keith F.	1970	"The higher the degree of military sophistication, the more likely that the political communities of a cultural unit will be militarily successful" (94)	Supported	2	Cite Related Hypotheses More By Author
Otterbein, Keith F.	1970	"The higher the degree of military sophistication, the less likely that the political communities of a cultural unit will be attacked" (90)	Not Supported	2	Cite Related Hypotheses More By Author
Otterbein, Keith F.	1970	"The higher the degree of military sophistication, the higher the casualty rates" (82)	Supported	2	Cite Related Hypotheses More By Author
Otterbein, Keith F.	1970	"The higher the degree of military sophistication, the more likely that the political communities of a cultural unit will engage in frequent or continual internal war" (85)	Not Supported	2	Cite Related Hypotheses More By Author
Otterbein, Keith F.	1970	"The higher the level of political centralization, the more likely that the military organization is composed of professionals" (22)	Supported	2	Cite Related Hypotheses More By Author