The Togae (Latin for civilian) family, commonly known as the Civilians, were an ancient class that seemed to have no special attributes. Research shows that they were very good parents and some say their children would stay with them for years, although there's no proof of this.
This class began the start of the B.G.W period. Over millions of years, they came up from the sea, became land mammals and grew into the 9 classes we all know today. All of the our heritage comes from this ancient class. Sadly, there are no actual Civilians left in the world. They couldn't compete with the other classes and eventually went extinct. However, they still live on through the all of the modern TF2-nimals.