about "Society Must Be Defended", lectures by Michel Foucault

I've been reading this Michel Foucault lecture series. In them, he reminds the audience that his concept of power has changed since he debuted with his seminal works on madness and punishment. Now he sees power not so much as represented in instances of repression, but rather as a flow or current between actors, a concept better represented as two actors engaged in battle. In Society Must Be Defended, Foucault explores this concept of battle, of war and its historical relation to the role of the nation State and its population's identity.

That Foucault adopts a new concept of power after having written his early works does not devalue them. Foucault's project has not changed: generally, he engages in an archaeological exploration of Western man's relation to himself; specifically, he analyzes how some people engineer and/or assume apparatuses of power used on other people.