Assessment of the threat environment is a critical element in the formulation of any state's strategy and defense doctrine. It also should be an inherently critical process that seeks to free policymakers from incorrect, antiquated, or misconceived perceptions about the threat. Consequently, the nature of the threat(s) the United States or any other government faces is the subject of a never-ending debate. For several years U.S. policymakers, officials, and writers on defense have employed the terms "asymmetric" or "asymmetry" to characterize everything from the nature of the threats we face to the nature of war and beyond. This monograph challenges the utility of using those terms to characterize the threats we face, one element of the broader debate over the nature of war, U.S. strategy, and the threats confronting us. As a work of critique, it aims to make an important contribution to the threat debate.