“It is almost impossible to shake of one's earliest training. Duke, can you get it through your skull that had you been brought up by Martians, you would have the same attitude toward eating and being eaten as Mike has.”

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.