Tan Trum and the four ladies all glared at me as though I had committed an impiety. The Professor stroked his beard in indignation; the mouths of Loa, Moa, and Noa all gaped wide with horror.

"Killed? Killed, young man?" thundered Tan Trum. "Never use that word in connection with war! It is not permitted! It is illegal, unpatriotic! No one is ever killed in war! Millions are sent to the Blessed Caverns, or converted into deathless heroes, or become the Unknown Warriors! But no one is ever killed! That is forbidden by law!"

"Young man," remonstrated Tan Tal, "remarks like yours are enough to ruin military morale!"

"If we didn't know you spoke in ignorance, sir, we would have you examined by the Intelligence Department, which would most likely have you executed for free speech!" threatened the Professor.

After a moment, however, he seemed softened by my contrite expression; and, regaining his good humor, continued.

"But I was going to explain about our Military Birth Extension Program. The principle is very simple. We have introduced Birth Uncontrol, and made it compulsory by law. The idea is that all families should have as many children as possible—sons, so that they may go out to fight for their country, and daughters, so that they may bear more sons to fight for their country. All couples married for ten years or over are required to pay a tax for every child which they have less than seven; while, for every child after the seventh, they receive a bonus. This system works so well that we are able to keep our population stationary."

"Stationary?" I cried. "At that rate, it ought to double every generation!"

"It would—except for the military turnover. As it happens, our boys are all enlisted in the reserve corps of the army at the age of six, and from that time forth are trained for the next war. So rigorous is the discipline that fifty per cent never reach sixteen. This is, in fact, one of the great merits of the system, as it ensures the survival of the fittest. At sixteen the youths are enrolled in the active army, and are sent to the front to face the boys of Zu. They then are offered the hope of being permitted to retire from military life at eighteen, if they should reach that age. But fifteen out of sixteen, in the course of these two years, enjoy the fate of heroes and go over to the Blessed Caverns."

I was about to comment, but refrained, for fear of breaking some penal law.

"Besides being profitable, it is a great honor to have many children," continued the Professor, with zest. "Mothers are given an honorary gold crescent for every son born to them; and fathers receive an honorary crescent of silver. Immediately upon the death—" here Tan Trum paused, and coughed in great embarrassment—"I mean to say, immediately upon the turnover of a son, the mother and father each receive another honorary crescent. It is this that makes Birth Uncontrol such a success."