Many Utopias have been dreamed up through the ages. From Plato's Republic to Thomas More's Utopia and beyond, serious thinkers have  　 societies where people live in peace and harmony. Most of these imaginary worlds have things in common: everybody is equal and plays a part in the running of the society; nobody goes without the essentials of life; people live mostly off the land; often there is no money, and so on. Another thing they have in  　 is that, to the average person, they appear distasteful or unworkable since they do not take into account ordinary human nature or feelings. Architects have got in on the act, too. After the Great Fire of London, Christopher Wren drew up plans for a reconstruction of the whole city, including  　 street widths. And in the 20th century there was Le Corbusier's Radiant City in which, if you weren't in a car or didn't have one, life would have been a nightmare. Also in the 20th century; another famous architect, Frank Lloyd Wright,  　 up a perfect city that got no further than the drawing-board. Wright believed that what was wrong with modern cities was, in his words, rent. Ideas, land, even money itself, had to be paid for. He saw this as a form of slavery and believed that modern city dwellers had no sense of themselves as productive  . Thus, Wright's city was to be made up of numerous   homesteads, and the houses themselves were to be simple, functional and in  　 with the environment. Everyone would own enough land to grow food for himself and his family. No outsiders would be allowed to come between the citizen and what he produced, or to exploit both for money. Goods and services would all be  　 , not bought and sold for profit.