Paul Gilroy is a British cultural theorist and sociologist known for his work on race, identity, and multiculturalism. He gained prominence with his influential book, "There Ain't No Black in the Union Jack," published in 1987, which explores the complexities of British national identity and the experiences of Black British people. Gilroy's scholarship often intersects with postcolonial studies and cultural studies, emphasizing the importance of understanding history and culture in shaping contemporary social issues. He has also contributed to discussions on diaspora and the impact of globalization on cultural identities, making him a significant figure in contemporary social theory.