“Anyone who cannot cope with mathematics is not fully human. At best, he is a tolerable subhuman who has learned to wear his shoes, bathe, and not make messes in the house.”

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.