The issue of immigration is the most significant social problem in modern Greece, especially when combined with the demographic crisis, the shrinking of the Greek population, and the exodus of the youth.

In just twenty years, Greek society transformed from a relatively homogeneous religious, cultural, and social community into a "multicultural" one, while the mass influx of immigrants drastically changed the social composition of Greek society.

In unskilled labor, construction, industry, shipping, and wage agricultural work, Greek workers have been radically replaced by immigrant workers.