§8Law and the debate

A treaty that forbids national appropriation, accords that permit extraction, protection rules that limit where anyone may walk, and the two books that argue over all of it.

Space is not a political blank slate. That sentence is the Weinersmiths’ claim, and the law as it stands mostly bears it out: there is a treaty, it has gaps, and the gaps are where the arguments live.

The Outer Space Treaty

§8.1 The 1967 Outer Space Treaty (OST) bars “national appropriation” of celestial bodies. Article VI requires states to authorize and supervise private actors: a company on Mars is its home state’s responsibility. Article IX requires the avoidance of harmful contamination. Property rights for land, as opposed to extracted resources, remain legally unresolved. established

The Artemis Accords

§8.2 The US-led Artemis Accords assert that resource extraction “does not inherently constitute national appropriation” and establish “safety zones” around operations. Other states contest the position, and it has not been debated in the UN Committee on the Peaceful Uses of Outer Space (COPUOS). The tension is structural: the treaty forbids appropriation, the accords permit extraction, and no forum has ruled on where one ends and the other begins. contested

Planetary protection

§8.3 COSPAR planetary-protection rules restrict access to “special regions” where Earth microbes might propagate. A human is a walking contamination source, so the rules directly constrain where crews may go, and they set exploration and settlement against the search for indigenous Martian life. The conflict is not hypothetical; it is written into the site-selection problem.

The debate: A City on Mars and its critics

§8.4 A City on Mars (Kelly and Zach Weinersmith, 2023) is the most rigorous popular skeptical synthesis. It argues that we lack essential knowledge on four fronts (human reproduction and child development in partial gravity, closed-loop ecology, space law and governance, and economics) and that we should go “big and slow” only after decades of research, with settlement realistically a 22nd-century prospect. Its governance argument, that settlement could import or trigger terrestrial geopolitical conflict, draws on Daniel Deudney’s Dark Skies. Reviews (Undark, Salon) praised its rigor; even settlement-friendly reviewers (Peter Hague) conceded many of the biological points while disputing the legal pessimism.

Weinersmith

The two questions that decide permanence — reproduction at 0.38 g and a closed ecology — have zero data. Rushing without legal and ethical groundwork is dangerous, because settlement could import or trigger terrestrial geopolitical conflict. Go big and slow, after decades of research; a city is a 22nd-century prospect.

Zubrin

Mars gravity is probably sufficient; perchlorate, dust, and radiation are engineering problems; the legal risks are speculative and overweighted. Law follows settlers, as it did historically on frontiers; enforcement mechanisms are premature; Deudney’s thesis is technically weak and anti-technology.

Bruce Jakosky occupies a middle scientific position: deeply skeptical of terraforming, neutral-to-cautious on settlement engineering. The genuine, unresolved scientific disagreements cluster on three things: partial-gravity biology (untested), reproduction (untested), and whether cost and cadence can fall far enough. Everything else is a difference in how to weight what is not known.

Expedition or settlement?

§8.5 An expedition raises a planetary-protection question and little else. A settlement raises all of it at once, land, extraction, and governance, and none of it is settled law.