“Every citizen is free to perform any act which does not hamper the equal freedom of another. No law shall forbid the performance of any act, which does not damage the physical or economic welfare of any other person.”

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.