This book examines the impact of Australian public opinion towards defence and foreign policy from the mid-twentieth century to the present day. For most of this period, the public showed little interest in defence and security policy and possessed limited knowledge about the strategic options available. The principal post-war exception to this pattern is, of course, the Vietnam War, when political divisions over Australia's support for the U.S.-led action eventually resulted in the withdrawal of troops in 1972. The period since 2001 has seen a fundamental change both in the public's views of defence and foreign affairs, and in how these issues are debated by political elites. This has come about as a result of major changes in the strategic environment such as a heightened public awareness of terrorism, party political divisions over Australia's military commitment to the 2003-11 Iraq War and the increasing overlap of economic and trade considerations with defence and foreign policies, which has increased the public's interest in these issues. Combining the expertise of one of Australia's foremost scholars of public opinion with that of an expert of international relations, particularly as pertains to Australia in Asia, this book will be a critical read for those wishing to understand Australia's alliance with the U.S., interactions with Asia and China, and the distinctive challenges posed to Australia by its geographic position.