* The rise of modernism: Modernism, a literary movement that emerged in the late 19th and early 20th centuries, rejected the traditional forms and conventions of poetry in favor of a more experimental and innovative approach. Modernist poets experimented with free verse, fragmentation, and unconventional imagery to create a new kind of poetry that reflected the complex and rapidly changing world of the twentieth century. Notable modernist poets include T.S. Eliot, Ezra Pound, and Wallace Stevens.
* The Imagist movement: The Imagist movement, which emerged in England in the early 1900s, was a response to the excesses of Victorian poetry. Imagist poets sought to create a more concise and concentrated form of poetry, using precise and evocative imagery to convey complex emotions and ideas. Notable Imagist poets include Ezra Pound, Hilda Doolittle, and Amy Lowell.
* The Harlem Renaissance: The Harlem Renaissance was a period of cultural and artistic flowering among African Americans in the United States during the 1920s and 1930s. During this time, many Harlem Renaissance poets explored themes of racial identity, social justice, and the African American experience. Notable Harlem Renaissance poets include Claude McKay, Langston Hughes, and Countee Cullen.
* The Confessional poets: The Confessional Poets were a group of American poets who emerged in the 1950s and 1960s who used poetry as a means of self-expression and personal revelation. Confessional poets often wrote about personal experiences, emotions, and vulnerabilities in a raw and unfiltered way. Notable Confessional poets include Sylvia Plath, Anne Sexton, and Robert Lowell.
* The Beat poets: The Beat poets were a group of American poets who emerged in the 1950s and 1960s who were inspired by the countercultural movements of the time. Beat poets were known for their unconventional lifestyle, their use of drugs, and their rejection of traditional poetic forms and values. Notable Beat poets include Allen Ginsberg, Jack Kerouac, and William S. Burroughs.
* The Language poets: The Language poets were a group of experimental poets who emerged in the 1970s and 1980s who challenged traditional notions of language and meaning in poetry. Language poets experimented with unconventional syntax, grammar, and punctuation, and often incorporated elements of popular culture and media into their work. Notable Language poets include Charles Bernstein, Ron Silliman, and Susan Howe.
These are just a few of the many developments that took place in poetry during the twentieth century. This period was a time of great creativity and innovation in the genre, and the resulting body of work continues to influence and inspire poets today.