How have the mass migrations of people shaped the world today? how are these migrations to break down boundaries? what are the dangers?

Migration means to leave their hometown or country and move to another place to study, work, or to reunite with their families, which has changed the demographic make-up of many towns, cities, and countries.

Migration can also be due to better educational opportunities, due to political unrest, natural disasters, war scenarios, or due to polluted environments.

Due to migration, the boundaries in between the nations and states are diminishing as the concept of globalized labor is increasing which connects the countries at different levels of economic development.

Mass migration indicates migration of large groups of people from one geographical area to another one.

The primary danger of mass migration is that it could lead create a hospitable environment for the entry of criminal aliens or terrorists into a country.

Corruption i think