Barbara Zanchetta analyzes the evolution of American-Soviet relations during the 1970s, from the rise of détente during the Nixon administration to the policy's crisis and fall during the final years of the Carter presidency. This study traces lines of continuity among the Nixon, Ford and Carter administrations and assesses its effects on the ongoing redefinition of America's international role in the post-Vietnam era. Against the background of superpower cooperation in arms control, Dr Zanchetta analyzes aspects of the global bipolar competition, including US-China relations, the turmoil in Iran and Afghanistan, and the crises in Angola and the Horn of Africa. In doing so, she unveils both the successful transformation of American international power during the 1970s and its long-term problematic legacy.