There is a demographic aspect to this. War and crime require a large percentage of young males. When Europe had these same demographics, it resulted in World War One and Two, where over 100 million people died (Islamic terrorism, on the other hand, has probably led to less than 1 million dead).

Samuel Huntington, in his famous book "The Clash of Civilizations" makes the very secular argument that the youthful demographics of the Islamic world would cause wars and conflict. Once the Islamic world starts aging, then the conflicts will reduce.