An analysis of the most highly contested articles on Wikipedia reveals the controversies that appear invariant across languages and cultures.

See the full article: Edit Wars Reveal The 10 Most Controversial Topics on Wikipedia | MIT Technology Review. The 10 most controversial topics are:

1. George W Bush
2. Anarchism
3. Muhammad
4. List of World Wrestling Entertainment, Inc. employees
5. Global Warming
6. Circumcision
7. United States
8. Jesus
9. Race and intelligence
10. Christianity