Linked from
The 39 pages that link to Balance of power, each with the reason it gives.
AllianceRelated: Alliances can aggregate power to counter a stronger state or coalition.
Political realismRelated: Realists see countervailing power as a constraint on domination.
Economic dispatchRelated: The dispatch solution must meet the required system load.
Great powerRelated: Other states often coordinate to limit a great power's preponderance.
Su QinRelated: The coalition sought to offset Qin by combining the strength of several states.
George FriedmanRelated: Friedman uses shifts in relative power to explain strategic competition.