4% is huge. That’s one in every 25 people, about 325 million people in total. The United States contains around 4% of the world’s population, for example.
It’s more than the combined population of the top ten megacities (pop. > 20 million) in the world.
In addition to that, immigrants and refugees are having an outsized influence on politics, and on who gets elected, in many countries around the world.
