Why Were Muslims Removed from the Position of Leadership (Imamate)? 

After centuries of ruling with pen and sword, Muslims eventually grew weary; the spirit of jihad within them cooled, and the power of ijtihad became paralyzed. The Book that had granted them the light of knowledge and the strength of action they reduced to a mere blessed relic, wrapped up and kept in covers. And the Sunnah of the Greatest Guide (peace be upon him), which had shaped their civilization into a complete intellectual and practical system, they abandoned. As a result, Muslims were removed from the position of leadership (Imamate). (Tanqeehat)