Islamization flowed from the cultural realm into social and political spheres.

Evidence

Beginning in the 1970s, Islamic symbols, beliefs, practices, institutions, policies, and organizations won increasing commitment and support throughout the world of 1 billion Muslims stretching from Morocco to Indonesia and from Nigeria to Kazakhstan. Islamization tended to occur first in the cultural realm and then to move on to the social and political spheres. — Samuel P. Huntington, The Clash of Civilizations and the…, 304