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Although notorious for its strict formal requirements, the sonnet is nevertheless represented by such wide-ranging examples as Maggie Anderson's "Sonnet for Her Labor" and Tyehimba Jess's "Millie and Christine McCoy"-poems that differ remarkably in subject, rhythm, and structure. It may seem counterintuitive that the sonnet-ostensibly rigid and timeworn-could accommodate such variety, but poet Carl Phillips contends that the form invites experimentation: when a genre's conventions are as recognizable as those of the sonnet, the opportunity to subvert them is especially irresistible.

Although Anderson's and Jess's sonnets are both widely celebrated for their striking originality, most modern examples of the form are generally regarded as conventional.

As a form, the sonnet encourages a surprising amount of variety, even though certain characteristics associated with it suggest this would be unlikely.

That the sonnet remains as popular as it is today is unexpected, given that many of the features associated with the form have long since seemed antiquated to readers.

Although the sonnet is now recognized for the way it facilitates experimentation, there was a long period in its history in which very little innovation occurred.