Cosmo Hamilton, born Henry Charles Hamilton Gibbs on April 29, 1870, in West Norwood, London, was an English playwright and novelist. He was part of a literary family, with several siblings who also pursued writing, including his brother Philip Gibbs, a renowned war correspondent, and Arthur Hamilton Gibbs, a writer. Cosmo Hamilton gained recognition for his works in both drama and fiction, often exploring themes of human relationships, societal expectations, and emotional conflicts. He was married to Beryl Faber, though details of their relationship remain limited. Hamilton's most famous works include novels that delve into the complexities of personal growth and social dynamics. Throughout his career, he built a reputation for creating characters whose emotional and psychological struggles resonate with readers. Hamilton passed away on October 14, 1942, at the age of 72 in Guildford, United Kingdom, leaving behind a legacy of writing that continues to be appreciated for its insight into human nature and the challenges of life.