Any definition which limits us is deplorable.
Sincerity doesn't mean anything. A person can be sincere and be more destructive than a person who is insincere.
Art is nowhere near as dangerous as it should be.
Good writers define reality; bad ones merely restate it. A good writer turns fact into truth; a bad writer will, more often than not, accomplish the opposite.
All plays are social comment to one extent or another.
I think I was probably wondering, having looked at human beings for a long time, wondering if evolution ever took place. And I still have my doubts.