Throughout human history people have always found ways to express their ideas to others. Handbills and flyers have covered city walls since the advent of the printing press. Graffiti has been around since Roman times.
In the 20th century, a new form of self expression emerged: the t-shirt. Originally introduced by the Navy in 1913, it took widespread use by soldiers in World War II to introduce the crew neck t-shirt to the public. The 1950s were also important in the history of the t-shirt, being worn as outerwear by such stars as Marlin Brando and James Dean. In the 1960s the t-shirt began to be used as a palette for expression. The first corporate advertising on a t-shirt was a can of Budwiser beer. Theres even a phrase for the ubiquitous nature of t-shirts as expression: Been there. Done that. Got the T-shirt
T-shirts can be used to express political views or show musical tastes, or lack thereof. Someone wearing a John Deere t-shirt is sending a very different message from the person in the t-shirt with a character from Japanese animation. And what business doesnt have their logo available on a shirt? People use shirts to tell others about which sports teams...