Watching the 30-year-old movie Thelma and Louise, about two friends on a road trip where everything goes wrong, might encourage you to compare nowadays to back then. Before they get into the car, the two friends take a selfie with their Polaroid instant camera. Nobody knew back then that this was called a “selfie.” You would just say: “I took a picture of us by holding a camera pointing at myself and my friend.”

This same phenomenon applies in other areas of life. Nowadays, everything has its name—every act, every habit (good or bad), every disorder. Today you would say that a kid is lactose intolerant. Years ago, you would say that the kid was spoiled and didn’t like milk. Today you would say that you are burned out, whereas back then people would label you as lazy and unambitious.

So there is more behind a 30-year-old “selfie” than you think. The world has changed not just in technology, but also in how we view ourselves and others.