Joseph Nye

What Is Hard Power? Meaning and Examples
Hard power is coercive influence that makes resistance costly or compliance useful in military and economic bargaining.

Power in International Relations: Definition, Elements & Types
Power is the ability to influence another actor's actions or decisions. It depends upon various factors and can assume a multitude of forms.

Hard Power, Soft Power and Smart Power: Meaning and Differences
Hard power coerces, soft power attracts, and smart power combines both according to the goals and limits of a foreign-policy strategy.