The Siege of Vicksburg was important to the Union troops because they were able to take control of the Mississippi River. This allowed the Union troops to cut the Confederacy in half and allowed the Union to cut of supplies/resources to Confederate states.
The Battle of Gettysburg was an important Union win because this was the last time in the Civil War that the Confederate troops truly invaded the North. After this battle they did not invade any state north of Pennsylvania.
The period saw major technological advances, including the adoption of gunpowder, the invention of vertical windmills, spectacles, mechanical clocks, and greatly improved water mills, building techniques (Gothic architecture, medieval castles), and agriculture in general (three-field crop rotation)
Create access to better education, provide more educated workers
People, who were classified as a new middle-class were people that started to make their own careers (starting business of getting a well-paid job), they have observed a great growth in their salaries at that time and had a lot of leisure time.
Expertise had a very important role - people believed that it is a solution to the weakness of society.