1. Lou Sullivan (1951-1991)

Since y'all are enjoying the "trans men/mascs never contributed anything to the community" trend a bit too much, here's some resources for you to actually research upon whenever you're done contributing to transmasc erasure in 2025 and making an absolute fool of yourself. This is by no means complete, so feel free to add whatever you feel is fit.

For the record: trans men and transmascs contribute to the community by just being alive. They don't have to prove their worth in order to receive the same level of support and visibility as other trans people. That said, here is a list of transmascs/trans men that actively contributed and still do contribute to trans history, queer history and human history.

1. Lou Sullivan (1951-1991)

American author and activist. He was the first transgender man to publicly identify as gay, and is largely responsible for the modern understanding of sexual orientation and gender identity as distinct, unrelated concepts. He founded FTM International, the oldest organization for trans men in the U.S. Here you can download his book "We Both Laughed In Pleasure", a collection of his diaries that discusses his childhood, transition, his push for heterosexuality to be removed from the medical transition criteria and his final days living with HIV.

2. Reed Erickson (1917-1992)

Founder of the Erickson Educational Foundation (EEF), a nonprofit organization funded and controlled entirely by him, which had the goal to "provide assistance and support in areas where human potential was limited by adverse physical, mental or social conditions, or where the scope of research was too new, controversial or imaginative to receive traditionally oriented support". He contributed millions of dollars to LGBTQ+ movements, and the EEF also worked as an information/counseling resource for transgender people.

3. James Barry (1795-1865)

Irish military surgeon, he performed the first recorded caesarean section by an European in which both the mother and child survived the surgery (previously only performed when the mother was already dead or considered beyond help). His body was desecrated and he was outed post-mortem, ignoring his death wish to not be inspected ("in the event of his death, strict precautions should be adopted to prevent any examination of his person - and the body should be buried in the bed sheets without further inspection").

4. Jamison Green (1948-)

American transgender rights activist, educator and author. He began openly living as a trans man in the late 1980s and is considered one of the few openly transgender men of that time, and took over writing in the FTM Newsletter after Lou Sullivan's death. Here you can find his autobiographical book "Becoming A Visible Man", described as the first great memoir by a trans man by the NYT. In 2009, he was the first transgender person to receive the Distinguished Service Award from the Association of Gay and Lesbian Psychiatrists.

5. Chase Strangio (1982-)

American lawyer and transgender rights activist. He's the deputy director for transgender justice, and staff attorney wirh the American Civil Liberties Union (ACLU). He is the first known transgender person to make oral arguments before the Supreme Court of the United States.

6. Chris Mosier (1980-):

American advocate for transgender rights and competitive triathlete. He is the founder of transathlete.com , a resource for students, athletes, coaches and administrators to find information about trans inclusion in athletics. He is the first known out trans athlete to join a U.S. national team different from his sex at birth.

7. Kylar Broadus (1963-)

American attorney, entrepreneur and trans rights activist. He founded the Trans People of Color Coalition, and became the first trans person to testify in front of the U.S. Senate when he spoke in support of the Employment Non-Discrimination Act. He was a professor of business law and workplace discrimination at Lincoln University, a historically black college. In 2019 he received the Trailblazer Award from the LGBT Bar Association of L.A.

Honorary transgender activist that heavily contributed to both the transmasc and the transgender community in general:

Leslie Feinberg(1949-2014)

American activist and author who identified as an anti-racist white, working-class, secular Jewish, transgender, lesbian, female, revolutionary communist. Zie used zie/hir and she/her pronouns. Zie wrote the novel Stone Butch Blues (zie posted it for free on hir own website, and you can and should read it), which won the Stonewall Book Award. This book is frequently taught at colleges and universities and is widely considered a groundbreaking work about gender. Zie actively worked to promote the shift the language from “transsexual” and “transvestite” to the contemporary term “transgender.” "There are other words used to express the wide range of "gender outlaws": transvestites, stone butches, androgynes, diesel dykes or berdache - a European colonialist term. We didn't choose these words. They don't fit us. It's hard to fight an oppression without a name connoting pride, a language that honors us...Transgendered people are demanding the right to choose our own self-definitions. The language used in this pamphlet may quickly become outdated as the gender community coalesces and organizes - a wonderful problem."

Hir last words were: “Remember me as a revolutionary communist."

Other transmascs/trans men who contributed to human history without directly contributing to queer issues (but nevertheless very relevant to queer history):

Alan L. Hart (1890-1962) : American physician, radiologist, tuberculosis researcher, writer and novelist. He pioneered the use of X-Ray photography in TB detection. Circa 1917 he became one of the first trans men in the U.S. to undergo a hysterectomy.

Michael Dillon (1915-1962): British doctor, author, and Buddhist monk. First known transgender man to undergo a phallophlasty between 1945-1949.

Billy Tipton (1914-1989): American jazz musician, bandleader and talent broker. His life inspired the 1998 novel "Trumpet" and a 2020 documentary film, "No Ordinary Man". He was only outed post-mortem.

Albert Cashier (1843-1915): Irish-born American soldier who served the Union Army during the American Civil War.

Harry Allen(1882-1922): American trans man who got arrested a shitload of times and beat cops up. Four of the women he dated committed suicide after finding out he was trans. He was jailed for two months as the press released at least 5 articles investigating whether he'd wear feminine undergarments- which he did not, even at the threat of solitary confinement.

Transmasc/trans men who are active musicians:

Mal Blum (1988): American indie rock/americana singer/songwriter.

Searows (2000): American indie folk/bedroom pop singer/songwriter.

Ice Seguerra(1983): Filipino pop singer/songwriter.

ElyOtto(2004): Canadian hyperpop and pop musician.

Sam Bettens(1972): Belgian country/rock/pop singer/songwriter, founder of the band K's Choice.

Lucas Silveira(1973): Canadian folk/rock vocalist, guitarist, and songwriter. Formed the band The Cliks. Silveira is credited as the first openly transgender man to have signed with a major record label.

Quantum Tangle: Canadian inuit throat singing/blues/folk rock musical group.

Cavetown(1998): British indie rock/pop singer/songwriter.

Laith Ashley(1989): Pop singer-songwriter, activist and entertainer of Dominican descent.