In the second half of the nineteenth century, Buenos Aires saw the great wave of immigration, primarily European, who came to our shores with the certainty of "becoming American" and become "somebody."

While it is true that not all newcomers were able to achieve their goals, and had to stay in tenements in the suburbs, the fact remains that the social advancement of immigrants was reflected in the next generation as was raised on "My son Dr. "Florencio Sánchez.Los immigrants brought with them their customs, tastes and cultural background, blending music from all over the world, like the Andalusian tango, the Cuban habanera, the schottische, the folklore of the countryside and Candombe brought by African slaves, giving rise to one of the most important musical events in our country: the black component tango.En regard to their roots, thesis provided in 1926 by Vincent Rossi specialist, some historians argue that it has any contribution from it.
"Tango is a popular aesthetic expression and the tragic sense of life," said Waldo Frank.

In1860 Argentina's population suffered no major demographic changes as the population remained relatively stable and immigration were insignificant when compared with that produced 1880.Si from well until mid-nineteenth century Argentina maintained a conservative Spanish style without encouraging mass immigration to the mainland, over the years, the government was in need of manpower to work the extensive argentino.La soil crops fall of Rosas at the Battle of Caseros (1852), gave rise to a new constitution, which encouraged the inmigración.La 1853 Constitution in Article 25 reads as follows:
"The federal government encouraged European immigration and may not restrict, limit, or impose any tax on entry into Argentine territory of foreigners who arrive for the purpose of tilling the soil, improving and introducing science industries and the arts"
While the call was for all foreigners who wanted to dwell on Argentine soil, the government thought that the country would arrive skilled labor, specialized farmers and ranchers with experience, can improve national agricultural production.

It assessed that it is unusual for this type of professionals leaving their home country to venture to immigration.

Many of the newcomers, who were poor and unskilled immigrants, had participated in the Paris Commune (1871), bringing the seeds of rebellion lr our country, which gave rise to the first labor strikes and Revelion with their ideas of anarchism and socialism.