It becomes quite apparent when you learn about all of the Irish Revolts that the Troubles were bound to happen. Ireland has always caused uprising, and many can be traced back to influence the Troubles. This list includes many of the major uprising within Irish's past.
1641 - Irish Rebellion of 1641
1798 - Irish Rebellion of 1798
1803 - Irish Rebellion of 1803
1916- Easter Rising
1919-1922 - Irish War of Independence
1969-1998 - The Troubles
1641 - Irish Rebellion of 1641
1798 - Irish Rebellion of 1798
1803 - Irish Rebellion of 1803
1916- Easter Rising
1919-1922 - Irish War of Independence
1969-1998 - The Troubles
http://history1800s.about.com/od/thebritishempire/tp/irishrebellions01.htm