The success of wheat growing depended upon the ability quickly to harvest the crop. Wheat must be allowed to stand until it is fully ripened. Then it must be quickly reaped and stored away out of the reach of the rain and wet. For a few weeks in each year there was a great demand for labor on the wheat farms. And there was little labor to be had. Cyrus H. McCormick solved this problem for the wheat growers by inventing a horse reaper. The invention was made in 1831, but it was not until 1845 that the reaper came into general use. By 1855 the use of the horse reaper was adding every year fifty-five million dollars to the wealth of the country. Each year its use moved the fringe of civilization fifty miles farther west. Without harvesting machinery the rapid settlement of the West would have been impossible. And had not the West been rapidly settled by free whites, the whole history of the country between 1845 and 1865 would have been very different from what it has been. The influence of the horse reaper on our political history, therefore, is as important as the influence of the steam locomotive or of the cotton gin.