This book aims to explore the nature of the relationship between political Islamist groups, with their diverse forms and intellectual and doctrinal backgrounds, and civil society institutions. It reveals the dimensions of the process of building political influence and ideological penetration, in order to achieve social and ideological dominance of political Islamist groups over civil society institutions. This is considered a preliminary and necessary step towards gaining political power and establishing Islamic societies and states, which is the ultimate goal of all political Islamist groups and factions.