depended on clever ideas realized as machines and on skilled humans learning how to operate those machines with intricate finesse
spiraling down highways across fields and through skies
assembling giant steel beams to create tall buildings
guiding tiny bursts of energy knocking out misfiring heart cells one after another again and again until heart beats on the screen become regular
in every field as the machines became more and more intelligent and more and more autonomous expert humans bonded with the machines that allowed them to achieve reliable results continuous improvement and valuable innovation
in later stages, when machine intelligence accelerated past human understanding
some machines also bonded with humans