"You are the light race, Mardonale the dark," continued Crane. "What are the servants, who seem half-way between?"
"They are slaves...."
"Captured savages?" interrupted Dorothy.
"No. They are a separate race. They are a race so low in intelligence that they cannot exist except as slaves, but they can be trained to understand language and to do certain kinds of work. They are harmless and mild, making excellent servants, otherwise they would have perished ages ago. All menial work and most of the manual labor is done by the slave race. Formerly criminals were sterilized and reduced to unwilling slavery, but there have been no unwilling slaves in Kondal for hundreds of karkamo."
"Why? Are there no criminals any more?"
"No. With the invention of the thought recorder an absolutely fair trial was assured and the guilty were all convicted. They could not reproduce themselves, and as a natural result crime died out."
"That is," he added hastily, "what we regard as crime. Duelling, for instance, is a crime upon Earth; here it is a regular custom. In Kondal duels are rather rare and are held only when honor is involved, but here in Mardonale they are an every-day affair, as you saw when you landed."
"What makes the difference?" asked Dorothy curiously.
"As you know, with us every man is a soldier. In Kondal we train our youth in courage, valor, and high honor—in Mardonale they train them in savage blood-thirstiness alone. Each nation fixed its policy in bygone ages to produce the type of soldier it thought most efficient."