Low Earth orbit (LEO) is simultaneously becoming more useful — thanks to large commercial constellations, cheap launch, and abundant earth-observation data — and more fragile. Kinetic anti-satellite (ASAT) tests conducted by multiple spacefaring powers over recent decades have generated debris clouds that threaten all users, including the testing state. The Kessler syndrome — a runaway collisional cascade that could render certain orbits unusable for generations — is no longer purely theoretical.
Abundance that depends on a shared floor
Satellite communications, earth observation, GPS-class navigation, and space science all depend on orbits remaining navigable. Unlike most abundance pillars, this one has a hard physical upper bound on how crowded it can safely become, and the failure mode — cascading debris — is effectively irreversible on human timescales. See Satellite Communications for the utility story and Multi-Planetary Civilization for why the failure mode matters beyond Earth.
Governance gaps
The Outer Space Treaty (1967) and follow-on agreements provide a thin legal floor but were not written for mega-constellations, rideshare launches, or counterspace weapons. Voluntary moratoria on destructive ASAT tests have been announced by some states and not others. Traffic coordination, collision-avoidance data sharing, and end-of-life deorbit compliance are partial and uneven. This is a Governance Protocols problem of the classic kind: technically tractable, politically under-resourced.
What abundance-compatible space looks like
Proposed elements include binding debris-mitigation standards, active debris removal (still experimental and expensive), transparent space-situational-awareness sharing, and norms against kinetic ASAT demonstrations. A commercial industry that cannot insure its own operations in a debris-cascading LEO has self-interested reason to support such norms; alignment between commercial and security actors is necessary but not sufficient.
Open questions
Whether Kessler-like cascades can be prevented by norms alone or require enforcement mechanisms that states have not yet agreed to, and whether non-kinetic counterspace (jamming, cyber, dazzling) becomes a substitute or a complement to kinetic action, are both unresolved. The wiki flags these without pretending to adjudicate.