It is very illustrative, see three maps that mark the start, jump exponentially and reached the highest level: This is the map prepared by Martin de Moussy, to be presented at the Paris Exposition in 1869, the map published by the house in Peuser 1913, and published by the Ministry of Transport of the Nation, published in 1950. His arrest visualization allows suggestive inferences. As our development is pulled by the value judgments of devolution demographic, we will put emphasis on populations around 1440 are in the range of 600 to 20,000, as well as urban centers less than that amount. This implies not only encourage voluntary migration from the Buenos Aires metropolitan area and other smaller metropolitan areas and provincial capitals, but also to maintain stable volumes of smaller settlements to those just mentioned, but exceeding 20,000. In numbers too thick, the latter would be about 120 settlements. Interestingly, taking as a parameter to the railway network, even in the advanced state of deterioration that is, verify that at least there are a number of potential settlements or settlements similar to 1440 identified the effects of devolution: So we would work for the purposes decentralized with about three thousand (3000) settlements. With the exception of Tierra del Fuego, there is almost exceptional urban centers outside of the rail network. It is more, there are some who settled pending a railway line, which despite being legally authorized to be erected was not for lack of budget or have lapsed authorized investor interest.