Function is the favorite term in the world of design to describe the practical purpose for which each project is intended. An architect's goal should be to bridge the gap between aesthetics and practical function. "An excellent design meets three criteria: it works well, responding to the needs and requirements of its users; it is well made with good and appropriate materials; it is aesthetically successful" (stack 37). That is, the building or space must be visually appealing, well crafted and practical to use. The bridges between these criteria are called ethical function. For example, if a school is visually appealing but does not allow students to move freely, it has failed to achieve an ethical function. Great works of architecture connect the idea of ​​aesthetics and function, function being the broader social idea of ​​interaction. When you look at a building, you recognize it just by its appearance, by its pure form: this is how most people identify buildings. However, to understand the structure in its deepest form we must seek an aesthetic connection with the social idea. How does this structure relate to the culture of its surroundings? This is what helps differentiate a building between a functional structure and an art. An example of such combinations is the campus of the University of Virginia, designed by Thomas Jefferson. The campus itself is beautiful architecturally, but also beautiful in the way it allows people to socialize with each other and move around. It is a place that allows for seamless social interaction. It is when this aestheticism and this social form come together that the building transforms into something more than just a building. There must be something to determine what constitutes a building as a… medium of paper… for others to base their designs on. If every building were like the Waterfall House, architectural innovations would be much harder to spot. He wouldn't challenge the minds of the public if he were constantly surrounded by them. New innovations in form and function are what makes the world of architecture go round. The balance between practicality (function), art (form) and social interaction are the driving forces behind all forms of architecture. The function must allow the building to be used for what it is intended for. The space must allow people to be interactive with each other and establish a certain level of comfort that people need to socialize. Finally, the space must be pleasing to the eye. It must serve its primary purpose and also allow secondary purposes to be noticed and appreciated. All three forces must be in harmony for a building to be considered great.