Five divisions constrain space expansion

Human expansion beyond Earth isn't a single continuum but passes through five qualitatively different divisions (near‑Earth/LEO, cislunar, planetary, interplanetary logistics, interstellar scales), each with its own dominant bottlenecks — energy density, closed‑loop life support, transit time, communications latency, and governance/commerce structures. Treating them as separate policy problems clarifies where to invest (power grids and propulsion for one division, autonomy and local manufacturing for another). — This reframing helps policymakers and the public prioritize funding and regulation by mapping which technologies and institutions are necessary at each stage of space expansion.