Statement
Published thought models are not directly comparable: one reported 98 people for a specific 6,300-year simulation with population and breeding constraints, while another estimated roughly 14,000–44,000 for a roughly five-generation, 150-year scenario. Neither establishes feasibility or moral permission.
Evidence dimensions
- Basis
- modeled
- Readiness
- early research
- Confidence
- strong
Assessment rationale
The cited studies use different journey durations, population constraints, genetic treatments, and success criteria; their reported outputs are model results rather than observations.
Citations and locators
- Computing the minimal crew for a multi-generational space travel towards Proxima Centauri b (opens external site in a new tab)
6,300-year scenario, demographic rules, breeding constraints, and reported 98-person result. · direct model - Estimation of a genetically viable population for multigenerational interstellar voyaging (opens external site in a new tab)
Approximately five-generation scenario and conditional population range. · direct model - HERITAGE: a Monte Carlo code to evaluate the viability of interstellar travels using a multi-generational crew (opens external site in a new tab)
Monte Carlo architecture and input-dependence of HERITAGE outputs. · scope boundary
Assumptions and limits
The assessment applies to this bounded statement and the cited source scopes. A source can support one relationship without validating a generation ship, and an editorial grade does not substitute for independent review or representative demonstration.
What would change this conclusion?
A standardized scenario and independently reproduced models could improve comparability; empirical evidence would still be required for biological transfer and no model grants moral permission.
Editorial record
- Prepared by: GShips Project
- Last reviewed: 2026-07-25
- Review status: substantive editorial review
- Reviewer: GShips Project editorial synthesis
- Independent review: pending two person required
- Conflicts: Publisher intends to explore a commercial venture based on some GShips work.
- High-consequence domains: medical, governance, intergenerational-rights