Muhammad's death at an early age caused the splintering of his religion into new sects, over the question of succession. The groups called themselves the [[Sunnis]] and the [[Shiite|Shi'as]]. Many attribute this split to the high degree to which authority was centered in the powerful character of Muhammad himself: without his powerful personality, the movement could not survive intact.<ref>Bernard Lewis, ''What Went Wrong''</ref> | Muhammad's death at an early age caused the splintering of his religion into new sects, over the question of succession. The groups called themselves the [[Sunnis]] and the [[Shiite|Shi'as]]. Many attribute this split to the high degree to which authority was centered in the powerful character of Muhammad himself: without his powerful personality, the movement could not survive intact.<ref>Bernard Lewis, ''What Went Wrong''</ref> |