@leon @ewen I think he didn't like his first name, Horace.

His SciFi stuff, as in space ships & alien worlds, he wrote every book within one continuous 5,000 years of future human history. He is considered to be the guy who originated the concept of a federation of planets. But there were entirely different eras: a Federation era with colony worlds & a unified space navy (most of his novels), a Space Viking era of reunification after a dark age, an endless Empire era - fascinating speculation.