The difference between soft power and hard power in diplomacy lies in the approach to influence. Soft power refers to the ability to shape preferences through attraction and persuasion, primarily using cultural influence, values, and policies. Hard power, in contrast, involves coercive tactics such as military intervention or economic sanctions to achieve foreign policy goals. Both forms of power are critical; effective diplomacy often requires a balance between them, leveraging soft power to build alliances while maintaining the option of hard power when interests are threatened.