Robert A. Heinlein

Robert Anson Heinlein was a pioneering American science fiction author known for his emphasis on scientific accuracy and critical thinking.

He was one of the first sci-fi writers to break into mainstream magazines and is considered one of the "Big Three" alongside Isaac Asimov and Arthur C. Clarke.

Heinlein's works often explored controversial social and political themes, including individual liberty, sexual relationships, and religion.

He coined several terms that entered the English language, such as "grok" and "waldo." Heinlein received numerous accolades, including the first Science Fiction Writers Grand Master award in 1974 and multiple Hugo Awards.

His influence on the science fiction genre and popular culture continues to be significant.