I guess the most authentic and irrevocable poetry is that which had to be written : the writer pushed by something more than ambition, curiosity or boredom. Rather, by need. Stevens' "poverty".
The poem is a resolution. A record of more-than-intellectual engagement.
I liked the Franz Wright poem included in the recent Poets & Writers feature. Wish I could have written it. (In fact I was tempted to think he had borrowed a certain vocabulary & rhythm from one of my poems! But that's very unlikely.)
This despite the fact that I was on the receiving end of one of his unpleasant email attacks. (The funny thing was I had the impression he thought I was someone else. I am someone else.)