30 March 2016
The estimated number of migrants around the world is 230 million, that is about 3% of the global population. Even if this share has not changed much in the past 100 years, the number of migrants has increased mainly for two reasons: the world’s population has quadrupled and, since the early 1900s, the number of countries has increased from 50 to over 200 – then, the number of borders increased.
redazione