Question

What was the single most important reason for the decline in illegal immigration between 2007 and 2009? What other factors were at play? Going forward, why might people think it is more likely that illegal immigration will fall rather than rise?

Answer 1

The single most important reason for decline in illegal immigration between 2007 and 2009 was the Great Recession. The unauthorized immigrant population of U.S. stabilized at the end of Great Recession, because the immigration rate from Mexico declined but same for the other regions of the world increased. Asia, Central America and some regions of Africa were the regions from where the unauthorized immigrants left and came to other regions of world. Mexico was the country where the number of unauthorized immigrants declined steadily since 2007, which was also the first year of recession. That is why Great Recession is considered to be the single important reason for the cause. Great Recession caused decline in unauthorized immigration of people, as the countries facing recession became very particular about the international and its population related affairs.
The illegal immigration may obviously fall, because as the word says, it is illegal. Migration of people from one country to another violating the rules and laws of that country is unethical in the eyes of international as well as domestic law. The immigrants affect the jobs, wages, and poor classes of the country where they migrate to. Crossing the international boundaries illegally is now also considered to be a terrorist activity which is a threat for every country.