The Age of the Imperium is not a technically-inclined era in human history. It is an age where problems are solved by brute force and ignorance, where dangers are either too gross or too unthinkable to elicit any other response. Little, if any, technological innovation and invention exists in the Imperium, and those that come into contact with technology use it with reservations and a reverence that is almost religious. The Space Marines, for example, treat their equipment and armour as if it were imbued with a will of its own -- a fine chest-plate, well looked after and constantly maintained, may reward its wearer by saving his life; whereas a Space Marine who neglects his equipment may be struck down by a leaking suit or malfunctioning weapon. Such is the will of the Emperor.