Which one of the following said, “the power is a matter of getting people to do what they would not…

In his classic 1957 Behavioral Science article “The Concept of Power” and his pluralist study Who Governs? (1961), American political scientist Robert A. Dahl formulated the standard behavioural definition of power: “A has power over B to the extent that he can get B to do something that B would not otherwise do.”