His adaptation of Enemy of the People was a complete perversion and misunderstanding of Ibsen - I like the Crucible, but it was based on a fundamentally inept parallel with the McCarthy era - as Eric Bentley has pointed out, while there were, indeed, no witches in Salem, there were Communists in the US. Which is not, before you jump to any conclusions, a justification of McCarthyism - it is just to point out that Miller did not have the vision to come up with an allegory that made actual sense. On the other hand it is his best play. Death of a Salesman has power, but it is, finally, a cloying domestic drama. After the Fall, as I said, is a mess and intellectually dishonest, poorly written and full of post-Marilyn apology and rationale. There are some other bad ones: View from the Bridge, The Price (which does have some good writing), Incident at Vichy. He also wrote some appallingly bad short stories. His ouvre is not a distinguished one.