Poets tend to form loose groups - the "Romantics" or the "Imagists". And sometimes they write manifestoes in the name of these groups. This can be good. It forces the poet and the audience to think. But it can also be dangerous. It can turn into a branding device so that potential readers believe they know all they need to know once they know you've been associated with a certain group or position. It can freeze things in place. That's where thinking stops.