What were the causes of Nationalism and Liberalism and why did these ideologies become strong and spread to other nations?

Based on your research and what you provided to the class, what were the causes of Nationalism and Liberalism and why did these ideologies become strong and spread to other nations? Explain, support and be sure to keep the 250 word requirement in mind. Please provide 2-3 sources. No encyclopedias, Wikipedia, or Brittanica.