Answer:
an increase in urbanization.
Historians refer to the rise of Andrew Jackson to the presidency as a “triumph of the white man’s democracy” because during the so-called “Age of Jackson” the right to vote was extended to nearly every white adult male, fueling the modern party system, and slavery became stronger in the south forcing thousands of Native Americans off their land.
The Democratic-Republican Party split over the presidential succession, when the party faction that supported the old Jeffersonian principles, led by Andrew Jackson, became the modern Democratic Party.
<u>Unrestricted Submarine Warfare</u> and <u>Zimmermann Telegram</u>
The reason why Harriet Beecher Stowe published her book is to show and highlight the evilness inside of slavery and how it is effecting lives. In doing this, she actually angered the Southern-Slave holders and they ended up inspiring the slave trade even more than before.
Hope this helps you!