Controversial Topic Ideas

I am not quite sure which topic that I will be researching yet, but I found two topics that I want to explore. The topics are: "Family Abuse" and "Suicide". I know that these are two very general topics, but I am a psychology major and I want to take a look at why these things happen. What makes a person want to committ suicide or what causes someone to put harm on a young child?Those are just some basic ideas that I have, so I hope that these library visits will help me figure out which one I want to explore and how to go about writing this interesting paper.