Leutze combined pioneer men and women, mountain guides, wagons, and mules to suggest a divinely ordained pilgrimage to the Promised Land of the western frontier. Within the left half of the picture is a depiction of the entrance to the San Francisco Bay, the Golden Gate, which is being pointed to by the pilgrim seated atop the rock in the foreground. Within the right hemisphere of the painting is a depiction of a valley, representing the Valley of Darkness and symbolic of the troubles faced by explorers. The imagery is familiar imperial iconography and is regarded as a symbol of American exceptionalism and the realization of Manifest Destiny, ultimately leading to the evolution of the American Empire.
Literary reference
The painting takes its inspiration from the closing lines of George Berkeley's Verses on the Prospect of Planting Arts and Learning in America:
Westward the course of empire takes its way;
The first four Acts already past,
A fifth shall close the Drama with the day;
Time's noblest offspring is the last.
Influences
The imagery of the pilgrim gesturing on a high rock is very similar to the 5 cent postage stamp, Fremont in the Rocky Mountains, that was part of the 1898 Trans-Mississippi Issue and reprinted a century later.
A Currier and Ives print from 1868 uses the same title and theme for a very different print, showing a railroad crossing a new settlement as the train goes west.
A photographic print and a stereograph by Alexander Gardner,[2] both of an 1867 end-of-track frontier construction train, were titled Westward The Course of Empire Takes Its Way.