While it was long assumed that legal norms are essentially defined by their force, it was H.L.A. Hart who raised doubts about whether law and coercion are necessarily connected, referring to the empowering, or more generally enabling, character exhibited by some legal norms. Prominent scholars following and refining Hart’s argument built an influential case for excluding force as a necessary element of the concept of law. Most recently, however, Frederick Schauer has made a strong case to reaffirm the force of law, shedding new light on this essential question. This book collects important commentaries, never before published, by prominent legal philosophers evaluating Schauer’s substantive arguments and his claims about jurisprudential methodology.