What happened because of the rise of nationalism?

The rise of nationalism led to the unification of various states and regions into cohesive nations, as seen in the unification of Italy and Germany in the 19th century. It also fueled independence movements in colonized regions, prompting countries in Africa, Asia, and the Americas to seek self-determination. However, nationalism also contributed to conflicts and tensions, as ethnic and national identities clashed, leading to wars and geopolitical strife, such as the World Wars in the 20th century. Overall, nationalism reshaped political boundaries and influenced global relations significantly.