One key difference between the spaceship and lifeboat metaphors in Hardin's essay is their focus on population control. The spaceship metaphor emphasizes the finite resources available to support a growing population, while the lifeboat metaphor highlights the importance of limiting access to the lifeboat (resources) in order to sustain those already on board.
i don't think so
Hardin's purpose in writing to Eleanor Roosevelt was likely to express his concerns about overpopulation and its implications for resource depletion, environmental degradation, and social issues. By reaching out to such a prominent figure, he aimed to raise awareness and inspire action on these pressing global challenges. Additionally, he may have sought to influence policy decisions and encourage a broader dialogue on sustainable development and population control.