The ease and accessibility of global travel, the non-stop mobility of travelers and immigrants, and the quantum leap in interpersonal contacts between peoples across all ethnic lines in America have radically changed the social, cultural and health equation.
Another important point: mobility.
"It's not possible to stop human mobility in the world," Leoluca Orlando told The Independent.
He said: "The proposal to stop DLA mobility component for people in residential care is still included in the Bill.
"It's not possible to stop human mobility in the world and if you try to stop it with violence, we are responsible for genocide".
"The scrapping of these maintenance grants is another way of stopping social mobility.
Stopping DLA mobility component for those in residential care may not be the most headline-grabbing proposal in the spending review, but there are few other changes that will have as dramatic an impact on one particular group.
In 1315, when the Venetian city-state was at the height of its economic powers, the upper class acted to lock in its privileges, putting a formal stop to social mobility with the publication of the Libro d'Oro, or Book of Gold, an official register of the nobility.
Beyond driving housing credit, she added, the system "basically stops flexibility and mobility in the labor market because you can perhaps find a new job in another city, but it will then be very difficult to rent a house there".
Beyond fueling housing credit, she added, the system "basically stops flexibility and mobility in the labor market because you can perhaps find a new job in another city but it will then be very difficult to rent a house there".
