Tango was born on the marshy banks of the Rio de la Plata, in the suburbs of Buenos Aires (Argentina) and Montevideo (Uruguay), during the last quarter of the 19th century. Because of emigration from many countries. Many Spanish and Italians, but also a very significant wave of immigration of Germans, Hungarians, Arabs and Jews. All these emigrants will form an uprooted working class, poor, and with few means of communication between them because of the language barrier, and mostly male. Due to the chronic lack of women - 75% of the population is male -, idle men dance among themselves. They draw inspiration from their traditional dances to invent new figures while imitating, to pastiche them, the local Picaresque dances and especially the rhythmic dances of the blacks inherited from the African candombé and the Cuban habanera, the latter itself being already a version imitated by the former black slaves of the contradance of their Spanish masters. The dance gradually codifies itself by generating more and more sophisticated figures. Began to appropriate dance and introduce it to the bourgeois brothels in downtown Buenos Aires.