Space is now a key stage in the competition among great powers. No longer peripheral, it is becoming integral to how states pursue dominance and shape the international system. Grand strategy is the long-term (multi-generational) effort by states to secure advantage and shape the international system. When great powers compete, they do so through rival grand strategies, extending their pursuit of security and influence across domains.
Today it reaches into space. Spacepower is not simply an extension of terrestrial capabilities but an integrating layer through which military, economic and informational systems are connected and contested. The ability to operate in, through and against space-based assets is fast becoming a defining feature of long-term strategic competition.
Space as strategic infrastructure
Modern societies depend on space-based systems in ways that are both widespread and often invisible. Satellite networks enable navigation, synchronize financial systems, support military operations and facilitate global communications. These functions make space assets critical infrastructure, comparable in importance to maritime trade routes or air corridors of earlier eras.
This centrality, however, introduces systemic vulnerabilities and dependence. As reliance increases, so does exposure to disruption – whether through physical interference, cyber operations or electronic warfare. Capability and fragility evolve together. This dynamic creates strong incentives for states to compete for access, resilience and control.
Because space functions as critical infrastructure, it has become a primary lever in great power competition. Control over these systems translates into influence over military operations, economic activity and information flows. In this sense, space is not simply a new domain but the next extension of grand strategy into a contested environment. Competition is therefore not about isolated capabilities but about maintaining the integrity of interconnected systems under pressure. Over time, advantage may depend less on dominance than on the ability to sustain this capacity in contested environments.
Spacepower and the evolution of rivalry
As dependence deepens, space becomes a domain through which states seek to secure advantage, impose costs and shape outcomes across other domains. Major powers are already adapting.
The United States, China and Russia are incorporating space into their strategic calculations not only as a capability but also as a domain of competition. This includes efforts to enhance resilience, develop counterspace capabilities and secure access to key orbital regimes. These actions reflect a deeper pattern: Great powers do not abandon the logic of competition as domains change; they extend it.
These adaptations, however, are not uniform. China’s approach emphasizes long-term civilizational dominance, using the 100th anniversary of the founding of the People’s Republic in 2049 as the symbolic apex of its national rejuvenation campaign. In practical terms, China is advancing positioning and system-building, including the development of independent navigation, communications, and cislunar (between Earth and the Moon) operations designed to reduce vulnerability and expand strategic reach. Russia has focused more heavily on denial strategies, including counterspace capabilities intended to offset asymmetries and complicate adversary operations. The U.S. has pursued a more integrated model, combining military, commercial and allied capabilities to maintain flexibility and resilience.
These differing approaches reflect not only technological choices but broader strategic cultures, suggesting that competition in space will be shaped as much by how states think about power as by the capabilities they deploy.
This pattern is not without precedent. Historically, the emergence of new domains has reshaped great power competition. The expansion of maritime power created new opportunities for influence while intensifying rivalry over access, trade routes and strategic positioning. Control of the seas became a defining feature of great-power status. Space may represent a comparable shift, with today’s rivalry echoing the great-power competition, empire-building and colonization of the 15th to 17th centuries more than the Cold War nuclear standoff.
Space is not devoid of geography; rather, it is continuously developing. It encompasses distinct regions and pathways that shape movement, access and strategic positioning. Low Earth orbit, geostationary orbit and key locations within the Earth-Moon system, including the Lagrange points – where gravitational forces align – are critical areas of focus and potential opportunities. Great powers compete where they can gain an edge, and space is increasingly becoming one of those arenas.
Beyond fixed positions, space also contains emerging lines of movement – efficient orbital pathways and transfer routes that enable access between regions. As activity expands, these pathways are likely to concentrate traffic based on efficiency, security and resource considerations. Over time, they may take on characteristics similar to lines of communication in earlier domains, where the ability to secure or disrupt movement shapes broader competition. As in maritime or continental environments, these features do not confer absolute control, but they do define where competition will occur – and where it may intensify.
For much of the modern era, geopolitical competition on Earth shaped activity in space. Space systems were developed to support terrestrial objectives, reinforcing existing patterns of rivalry. As dependence on space-based systems deepens and competition expands beyond Earth, the distinction between geopolitics and space-focused astropolitics is blurring. The two are starting to merge, with developments in space and on Earth increasingly shaping one another. Over time, this relationship may invert, with dynamics in space exerting a growing influence on geopolitical outcomes.
At the same time, integrating space into national systems introduces new pathways for competition to escalate. The relationship between space and terrestrial conflict is likely to be reciprocal. Actions against space-based systems may serve as an early move in a broader confrontation, shaping conditions before conflict expands on Earth. Conversely, conflicts originating on Earth may rapidly extend into space as states seek to disrupt communications, degrade intelligence capabilities or impose costs on critical infrastructure.
Deterrence, signaling and competitive endurance
The growing importance of spacepower complicates traditional deterrence models. In established domains, deterrence relies on clear thresholds and reliable attribution. In space, these conditions are less certain. Interference with satellites may be ambiguous, reversible or difficult to trace, allowing states to test capabilities and signal intent without triggering immediate escalation.
This ambiguity creates space for sustained competition below the threshold of war. States may impose costs, degrade capabilities or demonstrate resolve through calibrated actions that avoid immediate escalation while still shaping outcomes. At the same time, the interconnected nature of space-based systems means that even limited disruptions can trigger cascading effects across military and civilian domains.
The absence of clearly defined thresholds further complicates deterrence dynamics. A seemingly limited disruption may be interpreted as a precursor to broader conflict, while attempts at restraint may be misread or ignored. States must therefore operate with incomplete information about both adversary capabilities and intentions. Over time, this environment may increase the importance of signaling, redundancy and pre-crisis positioning as mechanisms for managing risk.
Space also functions as a signaling environment. Deployments, tests and orbital maneuvers communicate intent and shape perceptions among rivals. These signals may reinforce deterrence or increase uncertainty, depending on how they are interpreted.
In this environment, strategic advantage may rest less on decisive superiority than on the capacity for competitive endurance. Resilience, redundancy and the ability to operate through disruption may prove more important over time than achieving uncontested control. Sustained competition – not decisive victory – may define success in the space domain.