The exercise of critical thinking and independent judgment – or Ijtihad --was an important way to address questions in the early centuries of Islam. After approximately 400 years, however, the leaders of the Sunni Muslim world closed the "Gates of Ijtihad;" Muslims were no longer allowed use itjihad to solve problems.
If a seemingly new problem arose, they were supposed to find an analogy from earlier scholars and apply that ruling to the problem that arose. From the 10th century onwards, Sunni Muslim leaders began to see questioning as politically dangerous to their ability to rule. Regrettably, Sunni Muslim leaders reject the use of itjihad to this day. [Gatestone Institute] Read more