A popular mood known as "Young America" emerged in the 1840s. Territorial policy, economic expansion and growth, technological
progress, and a celebration of American virtue were characteristic of the Young American movement The American population
moved westward in the 1830s and 1840s for fertile land, economic opportunity, religious freedom, and a sense of adventure.
The most plausible reason for the Texas Revolution was the unwillingness of Anglo-Americans to accept Mexican rule. Manifest
Destiney was based, in part, on the belief that God was on the side of American expansionism. The Treaty of Guadalupe Hidalgo
provided the opportunity for additional expansion by the United States. For the American economy, railroads had an enormous
effect. Between the 1830s and 1840s, most of the immigrants to the United States came from Western Europe. In Moby Dick's,
Herman Melville produced a novel, original in form and conception, to fulfill the demand of Young Americans for a New Literature.
The inventor of the mechanical reaper was Cyrus McCormick. The leader of the Mormon trek to Utah was Brigham Young,