A challenge to long-held assumptions about the costs and benefits of America’s allies.

Since the Revolutionary War, the United States has entered into dozens of alliances with international powers to protect its assets and advance its security interests. America’s Entangling Alliances offers a corrective to long-held assumptions about US foreign policy and is relevant to current public and academic debates about the costs and benefits of America’s allies.

Author Jason W. Davidson examines these alliances to shed light on their nature and what they reveal about the evolution of American power. He challenges the belief that the nation resists international alliances, showing that this has been true in practice only when using a narrow definition of alliance. While there have been more alliances since World War II than before it, US presidents and Congress have viewed it in the country’s best interest to enter into a variety of security arrangements over virtually the entire course of the country’s history. By documenting thirty-four alliances—categorized as defense pacts, military coalitions, or security partnerships—Davidson finds that the US demand for allies is best explained by looking at variance in its relative power and the threats it has faced.

The Limits of Alignment is an engaging and accessible study that explores how small states and middle powers of Southeast Asia ensure their security in a world where they are overshadowed by greater powers. John D. Ciorciari challenges a central concept in international relations theory—that states respond to insecurity by either balancing against their principal foes, “bandwagoning” with them, or declaring themselves neutral. Instead, he shows that developing countries prefer limited alignments that steer between strict neutrality and formal alliances to obtain the fruits of security cooperation without the perils of undue dependency.

Ciorciari also shows how structural and normative shifts following the end of the Cold War and the advent of U.S. primacy have increased the prevalence of limited alignments in the developing world and that these can often place constraints on U.S. foreign policy. Finally, he discusses how limited alignments in the developing world may affect the future course of international security as China and other rising powers gather influence on the world stage.

Is America’s alliance system so quietly effective that politicians and voters fail to appreciate its importance in delivering the security they take for granted?

For the first century and a half of its existence, the United States had just one alliance—a valuable but highly controversial military arrangement with France. Largely out of deference to George Washington’s warnings against the dangers of “entangling alliances,” subsequent American presidents did not consider entering another until the Second World War. Then everything suddenly changed. Between 1948 and 1955, US leaders extended defensive security guarantees to twenty-three countries in Europe and Asia. Seventy years later, the United States had allied with thirty-seven.

In Shields of the Republic, Mira Rapp-Hooper reveals the remarkable success of America’s unprecedented system of alliances. During the Cold War, a grand strategy focused on allied defense, deterrence, and assurance helped to keep the peace at far lower material and political costs than its critics allege. When the Soviet Union collapsed, however, the United States lost the adversary the system was designed to combat. Its alliances remained without a core strategic logic, leaving them newly vulnerable.

Today the alliance system is threatened from without and within. China and Russia seek to break America’s alliances through conflict and non-military erosion. Meanwhile, US politicians and voters are increasingly skeptical of alliances’ costs and benefits and believe we may be better off without them. But what if the alliance system is a victim of its own quiet success? Rapp-Hooper argues that America’s national security requires alliances that deter and defend against military and non-military conflict alike. The alliance system is past due for a post–Cold War overhaul, but it remains critical to the country’s safety and prosperity in the 21st century.