Michel Foucault is a prominent thinker who has explored power dynamics through the concept of "structures of actions," although he doesn't explicitly use this exact term. His theory focuses on how power operates through various institutional and discursive frameworks, shaping both individual behaviors and broader societal structures.

Foucault's approach to power can be summarized in several key ideas:

1. Power as Productive: Unlike traditional views of power as purely repressive or coercive, Foucault argues that power produces and shapes social reality through discourses, institutions, and practices.
2. Disciplinary Power: He examines how modern institutions like prisons, hospitals, and schools use techniques of surveillance, normalization, and discipline to regulate and control individuals' behaviors.
3. Bio-Power: Foucault introduces the concept of bio-power to describe how states and institutions manage populations through policies and practices related to health, welfare, and biopolitics.
4. Governmentality: This concept explores how modern forms of governance operate through rationalities and techniques that shape individuals' conduct and subjectivities.

Foucault's work provides a critical lens for understanding power dynamics beyond traditional notions of sovereignty and legitimacy, emphasizing the ways in which power is dispersed and operates through complex social and institutional structures. His ideas have had a profound influence on fields such as sociology, political theory, and cultural studies.