By the way, I always thought that "Starship Troopers" were basically ancient Greece replayed in sci-fi setting. In Greece all citizens had to fight for the stat

By the way, I always thought that "Starship Troopers" were basically ancient Greece replayed in sci-fi setting. In Greece all citizens had to fight for the state, when the need arises (which was happening regularly and the threats were very serious). Sometimes they conscripted slaves, but the slaves were given freedom (or maybe even citizenship) after that.