“I am free, no matter what rules surround me. If I find them tolerable, I tolerate them; if I find them too obnoxious, I break them. I am free because I know that I alone am morally responsible for everything I do.”

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.