Why did Ireland leave the UK?

Related questions

1. Is Ireland still under British rule?
2. How many inhabitants does Ireland have?
3. Is Louth the smallest county in Ireland?
4. Was Drogheda ever the capital of Ireland?
5. What language is spoken in Ireland besides English?
6. Why is Ireland still divided?
7. What's Dublin famous for?
8. Is Ed Sheeran Irish?
9. Why did Ireland split from UK?
10. Was southern Ireland ever part of the UK?

Tags

1. #majority
2. #changed
3. #north
4. #within
5. #leaving
6. #after
7. #reason
8. #became
9. #sovereign
10. #ireland
11. #irish
12. #counties
13. #negating
14. #union
15. #state