Write a short note on Nationalism?

Please follow the given outline

1. Introduction: Start by defining nationalism.
2. Growth of nationalism - 19th century, Unification of Europe; 20th century, breaking of large empires, anti colonial struggles and liberation movements and finally post 1960, separatist movements e.g. Tamils in Sri Lanka etc.
3. Merits and demrits of nationalism
4. Conclusion: role of democracy

I hope it will help. Kindly consult teacher for confirmation.