Given how most people take selfies, you would probably think it was some 1990s teenage girl armed with an early Kodak digicam. But no, 21st-century-style selfies are actually an early 20th-century affair.
This photograph taken in December in 1920 might be the first modern selfie.

The possible creators of the first selfie are still in business.
These five gentlemen were the photographers of the Byron Company, a photography studio founded in Manhattan in 1892.

Photo by The Byron Company via The Museum of the City of New York
The more things change, the more they stay the same.