What led to the "brain drain" of scientists and engineers from Italy during the 1950s and the 1960s?

The decade that followed the end of WWII saw millions of Italians emigrate to North America and Europe. This wave of emigration also included a large number of school graduates that moved abroad for higher education and work. This phenomenon is often referred to as "brain drain" by Italians because many of these people didn't come back to Italy. <br><br>I am familiar with the economic reasons that led millions of people to leave the country, but for those with a diploma or a degree, job perspectives were not that bad in the country. So what led people with a good education to pursue a career abroad?<br><br>Was it the lack of freedom? Fascism in Italy had just ended, but the fear of a communist takeover was high in the years immediately following WWII and the years of the Cold War. <br><br>Or was it the war trauma? Even if Italy was on the winning side, the country suffered greatly during WWII, and millions of young, educated men were drafted and forced to fight in a war that they didn't want.