1920
- Stormé DeLarverie is born this year.
1921
- July 21: The U.S. Senate Committee on Naval Affairs officially renounces the tactics used in the Newport investigation.
1922
- The central limit theorem is proven — no one tells Alan Turing.
1923
- Willem Arondeus is hired to paint a mural at the Rotterdam Town Hall.
- The Scientific-Humanitarian Committee stops regularly publishing the “Yearbook for Intermediate Sexual Types”. They continue to publish it sporadically.
- Paramount Records asks Ma Rainey to record songs with them.
1924
- Ma Rainey records “See See Rider Blues.”
1925
- Ma Rainey is arrested for “running an indecent party” — a lesbian orgy. Bessie Smith pays her bail.
1926
- Alfred Kinsey publishes “An Introduction to Biology”.
1928
- Ma Rainey records and releases “Prove It On Me Blues” — a scandalous song about lesbianism. This is also Ma Rainey’s final year recording for Paramount Records.
1929
- Osch-Tisch dies.
- Carlett Angianlee Brown is born, and given the name Charles Robert Brown by her parents.
- Kurt Hiller takes over as chairman of the Scientific-Humanitarian Committee.