Rap music is destructive to young kids. Professional athletes are paid too much. All children should learn computer skills. Divorce is far too easy in the United States. Trials should be televised.
Tennis is the best sport.
Bilingual education does not work. All people should be vegetarian. An argument thesis is one that can be argued. Then, I could disagree, making it an argument paper. Pick anything that you have a fairly strong opinion about and can support your arguments intelligently, no matter how small or large the issue is.