Answer:
During this time, two central themes emerged: the origin and growth of industrialization and the increasing ability of societies to exercise power and influence over other societies through imperialism. Although imperialism wasn’t invented in this time period, it did grow to a much larger scale. Imperialism was seen throughout the globe as each country tried to gain power.
Nationalism helped strengthen imperialism by increasing the wealth and power of certain countries. This made those citizens proud of their country. Also, nationalism made countries feel entitled to more power and control, leading them to further conquer and imperialize even more land.
Political revolutions were also caused by imperialism. When empires would treat colonial citizens harshly, this sparked a revolution. The ideas of equality, liberty, and popular sovereignty added fuel to the fires.