Jacob Glatstein, or Yankev Glatshteyn, was a Polish-born Jewish American poet, novelist, and literary critic who primarily wrote in Yiddish. Glatstein was born in Lublin, Poland, in 1896 and immigrated to the United States in 1914, settling in New York City. He joined the Yiddish literary community, and following the First World War, alongside Aaron Glanz-Leyeles and Nahum B. Minkoff, he established the Introspectivist movement, which emphasised the self. Glatstein made major contributions to Yiddish and American modernist poetry, particularly through his linguistic experimentation and by writing on topics of international concern. His writing reflected the cultural exchange driven by Jewish migration from Europe to the Americas and demonstrated the cosmopolitanism of Jewish immigrants and travellers.