I'm offering the two sources below in case you want to do some background reading to either find out some basic facts or to think about the arguments related to your issue. Pay attention to the publication dates. Depending on your topic, you may want to be careful about pulling statistics or laws from older sources that are likely out of date. Ethical arguments about things like abortion or capital punishment have not changed that much over the years, but you wouldn't want to use old statistics about the number of abortions or executions.