By 2025, protective living communities (PLCs) had started to form. The earliest PLCs, such as New Promise and New New Babylon, based themselves on rationalist doctrines: decisions informed by best available science, and either utilitarian ethics or Rawlsian principles of justice (principally, respect for individual autonomy and a concern to improve the lives of those most disadvantaged). Membership in these communities was exclusive and tightly guarded, and they had the advantage of the relatively higher levels of wealth controlled by their members.

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