Evolution of the Apollo-Soyuz Test Project: The Effects of the “Third” on the Interplay Between Cooperation and Competition

The paper investigates the evolution of the first manned international space mission – a rendezvous and docking between a US and a Soviet spacecraft in 1975 known as the Apollo-Soyuz Test Project (ASTP). The aim is to reconsider the rationales behind the ASTP from both a conceptual and an empirical perspective in order to get a better understanding of the evolution of international cooperation in the highly competitive and strategic field of space technology. Based on archival sources from Moscow, it sheds some light on those factors that led to a change in the previous reluctance of Soviets to cooperate with the US in the manned spaceflight. From the theoretical point of view, it argues that the ASTP was as much a tool of competition as one of cooperation and resulted from an interplay between cooperative and competitive logics. To explain the turn towards cooperative practices, the article looks at the complex constellation of competitive relations that existed within the national and international context of space exploration and changed in the late 1960s and early 1970s. The decisive role in those changes was played by factors that can be subsumed under the notion of the so-called “third.”