To answer this, you just need to figure out what you think influences what. Do you think that society forces people into things they don't want, in turn "messing them up" or is it people influencing society, messing it up? It's similar to the age old question of which came first: the chicken or the egg. You just need to pick something and be able to support it in your answer for your seminar.
For the second part, you'll have to keep in mind your answer for the first part. Depending on what you choose there, you'll want to make sure your second answer supports this. It just wants you to pinpoint what, if anything, is wrong with people or society that might influence whichever way it is you're leaning for question 1.