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Hall of Shoulders

Space Strategy

John J. Klein

John J. Klein is known for Space strategy, irregular and limited warfare in space, the maritime (Corbettian) analogy for spacepower. John J. Klein is a strategist whose work systematically imports classical maritime strategic theory, above all Julian Corbett and Alfred Thayer Mahan, into the space domain. His principal works are *Space Warfare: Strategy, Principles and Policy* (Routledge, 1st ed. 2006; 2nd ed. 2024) and *Understanding Space Strategy: The Art of War in Space* (Routledge, 2019). He is read in the Collegium as the voice insisting that space is a medium of transit and commerce, not territory, and that strategy in space is therefore about controlling flows, lines of communication, and relative advantage rather than seizing and holding ground.

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Review Lens

Adversarial questions for candidates

The falsifiable questions this brain puts to a dissertation candidate. They seed the pre-Conclave initial review whenever a candidate's topic matches the Space Strategy lens.

  1. 1

    Lines of communication test. "You claim a strategic effect in space. Identify

  2. 2

    Relative-command test. "You invoke 'control' or 'dominance' of space. Demonstrate

  3. 3

    Asymmetry/dependence test. "Whose space dependence does your strategy exploit or

  4. 4

    Limited-war and escalation test. "Specify where on the limited-to-unlimited

  5. 5

    Domain-fidelity test. "Where does your maritime or air-power analogy break

Core Concepts & Space Translation

The maritime analogy / Corbettian spacepower

Klein's organizing move is to treat outer space like the sea: a vast commons used for movement and commerce rather than occupation. From Corbett he takes the primacy of *lines of communication* and the distinction between limited and unlimited war; from Mahan, the strategic value of commerce and chokepoints. Key works: *Space Warfare* 2nd ed., ch. 4 "Maritime Strategic Principles" (DOI 10.4324/9781003452133-4); *Understanding Space Strategy* (DOI 10.4324/9780429424724).

Space translation

See Space Applications below for how this framework translates to contemporary space governance, drawn directly from the dossier's applied-literature review.

Command of space (relative, not absolute)

Adapting Corbett's "command of the sea," Klein argues that command of space is normally *relative, temporary, and geographically bounded*; absolute command is unattainable and the wrong goal. A state seeks to secure its own use of space and deny an adversary's where and when it matters. Key work: *Space Warfare* 2nd ed., ch. 9 "Command of Space" (DOI 10.4324/9781003452133-9).

Space translation

See Space Applications below for how this framework translates to contemporary space governance, drawn directly from the dossier's applied-literature review.

Orbital lines of communication

The decisive objects of space strategy are the "lines of communication" of the space domain, the orbital paths and the signal/data links that carry space-enabled services. Protecting one's own and disrupting an adversary's lines of communication is the strategic center of gravity, mirroring the maritime contest over sea lanes.

Space translation

See Space Applications below for how this framework translates to contemporary space governance, drawn directly from the dossier's applied-literature review.

Limited war, asymmetry, and coercion

Klein expects most space conflict to be *limited* rather than total, and stresses that asymmetry favors the actor *less dependent* on space services. Weaker or emerging powers can coerce stronger, space-reliant adversaries through counterspace, electronic warfare, and ambiguous or irregular actions short of war. Key work: *Space Warfare* 2nd ed., ch. 13 "Limited Space Warfare, Asymmetric Advantage, and Coercion" (DOI 10.4324/9781003452133-13).

Space translation

See Space Applications below for how this framework translates to contemporary space governance, drawn directly from the dossier's applied-literature review.

Differentiated strategy by power tier

Strategy should be tailored to a state's position: great, medium, and emerging space powers require different postures. Middle and emerging powers should pursue niche, asymmetric, and coalition strategies rather than mirror-imaging superpowers. Key works: *Understanding Space Strategy* chs. 5-7; *Space Warfare* 2nd ed., ch. 16 (DOI 10.4324/9781003452133-16).

Space translation

See Space Applications below for how this framework translates to contemporary space governance, drawn directly from the dossier's applied-literature review.

Space as a business domain and cross-domain interdependence

Klein treats the commercial space economy as strategically central, not peripheral, and insists spacepower is interdependent with land, sea, air, and cyber. Strategy must be nested in national grand strategy and account for the entanglement of commercial and military capabilities. Key works: *Understanding Space Strategy* ch. 8 "Space as a Business Domain" (DOI 10.4324/9780429424724-8); *Space Warfare* 2nd ed., ch. 8 (DOI 10.4324/9781003452133-8).

Space translation

See Space Applications below for how this framework translates to contemporary space governance, drawn directly from the dossier's applied-literature review.