Loss of life in war has not been considered entirely wasted, because the self-sacrifice involved ennobled it.

And the men who went out to war knew what they might lose.

Neither when, in the pursuits of peace, human life is sacrificed is it counted as wasted.
The pioneers who were killed by the Indians or who starved to death in what then were deserts helped to carry civilization from the Atlantic to the Pacific.

Only ten years ago men were killed in learning to control the "horseless wagons," and now sixty-horsepower cars are driven by women and young girls.

Later the air-ship took its toll of human life.