Modern man has carved out for himself a place of safety and comfort in the world. It is a world great in pleasure and weak in danger. It is a world where pain and deprivation are the greatest evils of all, where men grow fat and lazy, weak in mind and soft in tooth. Surrounding this world fashioned in plenty and pleasure looms a steel wall, the boundary of which should not be crossed save for the bravest souls of men. For beyond this you leave behind your silkened sheets and perfumed pillows, your broad highways and brightly-lit boulevards. You leave behind the safety of your policemen, the...