I’ll give you a few to choose from:
-There were plenty of jobs (but low-paying) in America
-Gold Rush
-America had an open door policy (at least until the immigration act)
-Social mobility was possible (unlike restrictive social classes in England)
Please develop your question more
The Mexican war was justified under the principle of Manifest Destiny <span />
Tariffs increase the prices of goods.
Some people believe that tariffs cause a decrease in product quality
