What Genre Do Mr. Magoo, Star Wars, and Twelfth Night All Fit into? The Grawe Riddle.

When I was in my freshman year of high school, I remember asking the teacher, "Why are Shakespeare's plays called comedies?" I got an answer that satisfied me for the time, but confuses me now because Grawe seems to be attempting to integrate the two completely separate definitions of comedy that I thought I knew. The first definition of comedy defined comedy as something that was funny and made people laugh, plain and simple. The second definition, the one I learned after asking the question above, was that a comedy was anything that ended happily, wasn't too gory, and usually ended in marriage, as do most of Shakespeare's comedies. I thought of these two definitions as separate entities. I'm sure under scrutiny these definitions could use refining, but I've never really had occasion until now to scrutinize them.
Grawe's definition of comedy sounds very different in words than either of the two mentioned above; it is defined as something that reassures us that "humans will survive". Why does he need something so broad? I'm still not quite sure, but one thing I do know is that his examples are examples that fit into either one or the other of my own definitions. For example, Mr. Magoo fits into my first definition; it is something that makes people laugh. On the other hand, Shakespeare's comedies like Midsummer Night's Dream fit into my second definition. None of his examples that I know fit my both of my definitions. I think that my definitions are better starting points for defining comedy. All comedies fit neatly into one definition or another and it excludes many other things that don't really seem like comedies. Grawe's definition is just too broad.
Who before coming into this class, would put Twelfth Night, Mr. Magoo, and Star Wars into the same genre? Not me. I would like to know how many genres Grawe thinks exists. Is it just one? It seems like it. For instance, I think that Star Wars fits into a drama genre far better than a comedy genre. Don't you agree? I mean unless you saw a parody, who came out of the theatre after watching Revenge of the Sith thinking, "Man that was hilarious! I laughed so hard I cried." Maybe a few people laughed at the bad acting in some of the Star Wars movies, but that was obviously not the intention. The books the movies are based upon, as well as the movie, is philosophically debated at many intellectual conferences (although to be fair some of these, although not all, are "just for fun"). Star Wars is dead serious, minus any actor's short comings in its representations. Grawe's definition seems fatally flawed this way.