A chronological list of research on the history of sexuality and gender with a focus on the United States and England. This timeline is a collaborative work-in-progress. Some of the language used and concepts referenced, influenced by colonialism, imperialism, racism, sexism, and anti-LGBTQ+ beliefs and practices, might have been considered offensive or otherwise problematic by the individuals discussed in the historical documents; some might be considered offensive or otherwise problematic by LGBTQ+ people today or in the future. All of this is part of LGBTQ+ history. We welcome new contributions; please contact email@example.com. First published on OutHistory in 2015; last update in 2023.