Leslie Feinberg was an American author, activist, and speaker known for their work in the LGBTQ+ rights movement. Born on September 1, 1949, Feinberg identified as transgender and was a prominent advocate for gender and sexual diversity. Their influential book, Stone Butch Blues, published in 1993, explores themes of gender identity and the struggles faced by butch women and transgender individuals. Feinberg was also involved in various social justice causes, including labor rights and anti-racism efforts. They were a key figure in the gender nonconformity movement and worked to raise awareness about the challenges faced by marginalized communities. Feinberg passed away on November 15, 2014, leaving a lasting legacy in activism and literature.