“When a place gets crowded enough to require ID's, social collapse is not far away. It is time to go elsewhere. The best thing about space travel is that it made it possible to go elsewhere.”

American science fiction writer of the mid-20th century, Heinlein is best known for pioneering hard science fiction and exploring themes of individualism, duty, and human adaptability. His works, including *Starship Troopers* and *Stranger in a Strange Land*, blend speculative fiction with philosophical depth, influencing generations of writers and thinkers.