of Colombia). That function of planning unfolds in a double dimension: from one side as an instrument of rationalisation of government action and public spending through the definition of principles, goals, strategies and instruments of governance in a given period; from another, as a mechanism to foster a new relationship between the State and civil society, redefined in democratic terms, in which dialogue and concertation will become privileged in the search tools joint development and collective well-being. In other words, do not want to only get a product, plan; It seeks equally, unleashing a, the planning process that mobilize citizen opinion and that make the entire country in its ethnic, territorial, environmental, gender diversity, organizational and social, without exclusions, play a more active role in the construction of a new citizen and a welfare society. Urban, by the principle of complexity problems are expressed in each of the attributes of the city: land, housing, transportation, utilities, equipment and public space. The economy is essential for democracy, because freedom is based on the property, understood in their public and private expressions which are conjugated in the city. If the Greek polis was born the philosophy, democracy and politics, the oldest and most present, intellectual productions and if polis meant the set of community, political, moral, cultural, and even economic life, we can think that the contemporary city must mean something more than she currently is: at least something of what was the Athens of Pericles, who came to show how the polis was first and foremost a lifestyle in his funeral oration.

Cities built to the measure of the man with spaces in which the mutual knowledge, educating the mind and character of citizens could promote. But also, something different from what today shows the cities against the globalization of the economy. Cities with sizes and densities disproportionate, outside of any human scale, fully intersected by these unexpected mutants of our time: televisions, computers and other devices that make us believe that we interact statement in the globalized world as if it were a village.