He was the most important writer of the most important era of the most important sci-fi magazine with his work for Astounding in the 1940s. The period where he was really “Heinlein unleashed” AND was an important and influential author was really Starship Troopers through The Moon is a Harsh Mistress, which was 8 years of his career of what, 45 years? I haven’t read the later stuff. I should at least read Time Enough For Love. I know that’s the one where Lazarus Long fucks his great grandmother and then giver her one of his pubes to remember himself by, or something like that.