Gerald K. O’Neill presents his visionary plan for human space colonization in the post-Apollo era. The book details three designs for rotating space habitats that could house millions of people near Earth-Moon Lagrange points. O’Neill proposes using lunar materials, launched via mass drivers, to construct these colonies. The habitats would feature Earth-like gravity, solar power, and agricultural areas. He presents space colonization as both technologically feasible and economically beneficial through ventures like solar power satellites.
