This roundtable debates ideas and evidence in Diane Pfundstein Chamberlain’s recent book, Cheap Threats; Why the United States Struggles to Coerce Weak States. Pfundstein Chamberlain’s book considers the important puzzle described in the title, and in doing so puts forth a surprising new theory of coercive diplomacy. The reviewers praise some aspects of the book, but they raise concerns about both theory and evidence. Pfundstein Chamberlain responds comprehensively to the critiques. The debate is particularly interesting because the reviewers, though all experts in coercion and/or deterrence, approach the book from quite different angles.