"The proper officers will take the offspring of the good parents to the pen or fold, and there they will deposit them with certain nurses who dwell in a separate quarter; but the offspring of the inferior, or of the better when they chance to be deformed, will be put away in some mysterious, unknown place, as they should be."
This was just a hypothetical, but Plato was thought to be influenced by Sparta. He's very explicit about the eugenic principles behind this idea.
"The proper officers will take the offspring of the good parents to the pen or fold, and there they will deposit them with certain nurses who dwell in a separate quarter; but the offspring of the inferior, or of the better when they chance to be deformed, will be put away in some mysterious, unknown place, as they should be."
This was just a hypothetical, but Plato was thought to be influenced by Sparta. He's very explicit about the eugenic principles behind this idea.