During the renaissance many ideas of a utopia, both as a society and as a city, surfaced. Utopia was considered to be a place where there was perfection in the whole of its society. This idea was started by Sir Thomas More, when he wrote the book "Utopia". The book described the physical features of a city as well as the life of the people who lived in it. His book sparked a flame in literary circles. A great many other books of similar nature were written in short order. They all followed a major theme: equality. Everyone had the same amount of wealth, respect, and life experiences. The society had a calculated elimination of variety and a monotonous environment. The city where they lived was always geometric in shape, and was surrounded by a wall. These walls provided military strength, but also protected the city by preserving and passing on man’s knowledge. The knowledge, learning and science gave form to the daily life of the people living inside the walls. The knowledge of each person was shared by the entire society, and there was no way to let any information either in or out. As Thomas More said in his book, "He that knows one knows them all, they are so alike one another."