Poetic Licence in American Postmodernist Poetry

Since the 1950s, American postmodernist poetry has undergone changes in the new historical environment, forming its unique artistic style and characteristics in the process of breaking through poetry in the past. The manifestation of poetry tends to be colloquial and scattered, and does not insist on the depth of thought. However, it can not be ignored that there is a certain relationship between postmodernist poetry and previous poetry, that is, the relationship of spiral circulation and recurrence as David Perkins thinks.