 Whatever other vicissitudes his views went through, he firmly retained his belief in the direct and inextricable connection between human liberty and expansion into space, for which reason he strongly cried out against any idea of space exploration being "a waste of money" or "unnecessary luxury".The connection between space flight and freedom is clearly (as is stated explicitly in some of the stories) an extension of the 19th-century American concept of the Frontier, where malcontents can advance further and claim some new land, and pioneers either bring life to barren asteroids (as in "Tales of the Flying Mountains") or settle on Earth-like planets teeming with life, but not intelligent forms (such as New Europe in "Star Fox").As he repeatedly expressed in his nonfiction essays, Anderson firmly held that going into space was not an unnecessary luxury but an existential need, and that abandoning space would doom humanity to "a society of brigands ruling over peasants."