Given the nature of space as an access-constrained environment, combined with the domain-killing risk of Kessler Syndrome and nuclear escalation, both frameworks for cooperation and deterrence have been proposed along the competition-conflict continuum. From the earliest era of the Cold War, both Eisenhower, and later Kennedy up to his assassination repeated calls for US-Soviet space cooperation, proposing exchange of weather data, coordinated launch of meteorological satellites and geomagnetic field mapping; Gorbachev attempted to persuade Reagan of a joint mission to Mars. The US Schriever space wargames have recommended the establishment of a space systems "order-of-battle" comprising assets owned and operated by multiple nations / nonstate actors, private corporations, as they complicate targeting for the strategic calculus of any potential aggressor, compelling an adversary to contend with all stakeholders, including potentially neutral / friendly actors. To extend this rationale to its extremity, the greatest deterrence would arise by extending cooperation to competitor or adversary nonstate actors themselves, giving guaranteed mutual detriment from any aggression leading to self-punishment. Accompanying such deterrence is the need to establish various forms of tripwire response and red lines, with the presence and force to detect aggression and respond with punishment. For instance, whilst the Outer Space Treaty prohibits nuclear weapons in orbit, the paradoxical question remains of whether any violation could ever even be detected, and if confirmed, whether any credible response could be enforced to punish the violation - if the Treaty itself compels no weapons in space. Consequently space warfare operates in a hybrid area where actions may be clandestine (undetected by adversary) or covert (detected, but with uncertainty in attribution) - extending into a sixth domain of cognitive operations by private sector agents reframing moral judgements and shaping the will to fight, the perception and comprehension of reality.
Given the infinite frontier of space, compared to the localised zone of conflict characterised by terrestrial operations, it is also possible to imagine future paradigms where the primacy of human life and survival supersedes national interest. The ever-growing space domain and the economic development of the Inner Solar System represents radically expanded potential living space for humanity and unimaginable resources and energy for exploitation, with tremendous growth potential beyond the comprehension of security, diplomacy and behavioural norms known today, as successful interplanetary development increases the ultimate long-term survival of humanity itself.