other writers also became well known during this period. They include Jean Toomer, author of Cane, a famous collection of stories, poems, and sketches about rural and urban Black life, and Dorothy West, whose novel The Living is Easy examined the life of an upper-class Black family. Another popular renaissance writer is Countee Cullen, who in his poems described everyday black life (such as a trip he made to Baltimore that was ruined by a racial insult). Cullen's books include the poetry collections Color (1925), Copper Sun (1927), and The Ballad of the Brown Girl (1927). Frank Marshall Davis's poetry collections Black Man's Verse (1935) and I am the American Negro (1937), published by Black Cat Press, earned him critical acclaim. Author Wallace Thurman also made an impact with his novel The Blacker theerry: A Novel of Negro Life (1929), which focused on intraracial prejudice between lighter-skinned and darker-skinned African Americans. The Harlem Renaissance marked a turning point for African-American literature. Prior to this time, books by African Americans were primarily read by other Black people. With the renaissance, though, African-American literature—as well as black fine art and performance art—began to be absorbed into mainstream American culture. Civil Rights Movement era A large migration of African Americans began during World War I, hitting its high point during World War II. During this Great Migration, Black people left the racism and lack of opportunities in the American South and settled in northern cities such as Chicago, where they found work in factories and other sectors of the economy. This migration produced a new sense of independence in the Black community and contributed to the vibrant Black urban culture seen during the Harlem Renaissance. The migration also empowered the growing Civil Rights Movement, which made a powerful impression on Black writers during the 1940s, '50s and '60s. Just as Black activists were pushing to end segregation and racism and create a new sense of Black nationalism, so too were Black authors attempting to address these issues with their writings. One of the first writers to do so was James Baldwin, whose work addressed issues of race and sexuality. Baldwin, who is best known for his novel Go Tell It on the Mountain, wrote deeply personal stories and essays while examining what it was like to be both Black and homosexual at a time when neither of these identities was accepted by American