If it mattered in 2015, it was on Facebook. Yes, we all run to the popular social networking site to discuss the issues du jour.

Well, Facebook did us all a favor by creating this year in review video.

Facebook also did some research to come up with a list of the most-discussed subjects around the world. Here's a look:

1. US Presidential Election
2. November 13 Attacks in Paris
3. Syrian Civil War & Refugee Crisis
4. Nepal Earthquakes
5. Greek Debt Crisis
6. Marriage Equality
7. Fight Against ISIS
8. Charlie Hebdo Attack
9. Baltimore Protests
10. Charleston Shooting & Flag Debate

If you want to break it down further, here are the 10 most popular topics on Facebook in the US.

1. US Presidential Election
2. Marriage Equality
3. Charleston Shooting & Flag Debate
4. Star Wars: The Force Awakens
5. Baltimore Protests
6. Planned Parenthood
7. Super Bowl
8. November 13 Attacks in Paris
9. Fight Against ISIS
10. Nepal Earthquakes

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