Poetry groups and movements or schools may be self-identified by the poets that form them or defined by critics who see unifying characteristics of a body of work by more than one poet. To be a 'school' a group of poets must share a common style or a common ethos. A commonality of form is not in itself sufficient to define a school; for example, Edward Lear, George du Maurier and Ogden Nash do not form a school simply because they all wrote limericks.
There are many different 'schools' of poetry. Some of them are described below in approximate chronological sequence. The subheadings indicate broadly the century in which a style arose.