S.P.E.R.M. is a system of classifying causes and effects in historical study. The classifications are Social, Political, Economic, Religious, Military and sometimes Scientific. Virtually every event or idea can be classified in one of these six ways. Sometimes a single event, especially more complex events, can be classified in more than one way.
Use S.P.E.R.M. to classify the various causes of the rise of Islam. Be sure you consider all of the facets.