The question of fate and Destiny is a philosophical question, and should normally be looked for in the books of philosophy.
This heading includes various subjects, events and questions, namely historical, psycho.
Here this question is being studied under the heading of "The causes of the decline of the Muslims".
However, in this book it has been taken out of its proper context and grouped with questions which are neither connected with regard to its subject nor with its object of its study.
The question of fate and Destiny is a philosophical question, and should normally be looked for in the books of philosophy