The popular definition of tragedy is heavy drama in which everyone is killed in the last act, comedy being light drama in which everyone is married in the last act.
Drama is the most difficult of all arts. In it two things are to be satisfied - first, the ears, and second, the eyes. To paint a scene, if one thing be painted, it is easy enough; but to paint different things and yet to keep up the central interest is very difficult. Another difficult thing is stage - management, that is, combining different things in such a manner as to keep the central interest intact.
I feel like a lot of my past career was going to film school, making a lot of different kinds of movies. I made a bunch of comedies, I made one drama and I made a couple musicals.