Notable Point ยท 53:59-54:53

Shared threats and hostile allies

Internal hostility can persist inside an alliance, while a larger common threat can keep its members cooperating.

Notes

Alliances can join states whose interests remain in conflict. The Holy Alliance is offered as an example of cooperation weakened by hostility among its members. The comparison with NATO adds a qualification: disagreements inside an alliance need not prevent cooperation. A sufficiently large shared threat can persuade members to set their disputes aside.