Jacob Bronowski profiles man's discovery of action in the one-hour Ascent of Man: Grain in the Stone. Part of a 13-episode series tracing human evolution, this program explores the results of a more complicated society. First seen in ancient civilization of Machu Picchu, science was important to emerging cities. This reliance on theoretical knowledge allowed the building of Greek temples and French cathedrals. It carried human action all the way to present day sprawl as seen in places like Los Angeles. Here, man discovers the strength of his own hands. ~ Sarah Ing, All Movie Guide