May Sinclair, the pseudonym for Mary Amelia St. Clair (1863 – 1946), was an English novelist, poet, and critic, known for her innovations in modernist literature and her penetrating explorations of consciousness. Her literary output includes over twenty novels, two collections of short stories, a collection of poetry, and several philosophical works. Sinclair was part of the first wave of British modernists, and her work is characterized by its psychological depth and narrative experimentation. Perhaps one of her most significant contributions to literary modernism was the introduction of the stream of consciousness technique to English literature, predating Virginia Woolf and James Joyce. In her novel 'Superseded' (1911), Sinclair delves into the psyche of her protagonist, employing introspective and analytical styles to underscore the complex interplay between personal growth and social expectations. Sinclair's work often broaches the themes of feminism and the role of women in society, which were groundbreaking at the time. Her critical essay 'The New Idealism' showcased her philosophical interests and also reflected in her fictional narratives. As a member of the Woman Writers' Suffrage League, Sinclair actively engaged in the cultural dialogues of her day, blurring the boundaries between her writing and her social activism. Her legacy, while somewhat overshadowed by her contemporaries, has been the subject of critical re-evaluation, affirming her place as a significant figure in early 20th-century literature.